Philosophy Issues Paleys Argument of Eye and Telescope

I. I. â€Å"I know of no better method of introducing so large a subject, than that of comparing a single thing with a single; an eye, for example, with a telescope. As far as the examination of the instrument goes, there is precisely the same proof that the eye was made for vision, as there is that the telescope was made for assisting it.† (William Paley).Advertising We will write a custom term paper sample on Philosophy Issues: Paley’s Argument of Eye and Telescope specifically for you for only $16.05 $11/page Learn More Paley argues that an eye and a telescope are so much specialized in their function that they cannot be the product of an accident. They must have been designed. Even if we have never seen the designer, we should not claim that there is none. Paley (1) started his argument by the perception that someone has when he randomly meets stone and a watch. The person who meets a stone will conclude that the stone could have been t here all along or been there purposelessly. However, the watch must have been made by someone because there is no way different parts can come together by themselves to perform a single function. The strength of Paley’s argument is that a good product is rarely the outcome of chance or an accident. An eye and a telescope are almost similar in the parts that they assemble to provide vision, particularly in the use of lenses and the formation of the image behind the lenses. If the parts of the telescope must be assembled by a designer, it follows that the parts of an eye must have been assembled as well (Paley 2). Paley’s argument creates the impression that living things have parts that are so much specialized that they must have an author. In a human being, there are sets of organs that perform specialized functions. The organs operate more efficiently to conserve energy. According to Darwin, the parts evolved from simple forms to more complicated and specialized forms . Whewell (194), in response to Lyell’s Principles, declared that there should be evidence of the cause of the change from one form to another. Darwin (8) argued that the cause of change is the struggle for existence. It allows individuals who are highly adapted to propagate their genes at the expense of the weaker ones of the same species. There is evidence of a continuous struggle for existence among living things. The question that can be raised is that a species cannot develop an eye if it is not encrypted in their DNA. Someone would want to know how the struggle for existence has finally resulted in the encryption of new parts into the DNA of a certain species.Advertising Looking for term paper on philosophy? Let's see if we can help you! Get your first paper with 15% OFF Learn More Biology indicates that animals may change the size, color, and shape of existing parts only because they already exist in their DNA. In Biology, only certain chemicals may resul t in the change of the DNA. The struggle for existence cannot change the DNA that can result in the formation of new parts. However, it can result in stronger and better-adapted parts and forms of life (Darwin 8). Hume (4) dismissed the adaptation of parts because the animals that become adapted finally die and new ones are produced. However, Darwin’s approach is that animals that have certain better abilities propagate their genes because of their specialized abilities. In the example of the eye, a human being with the best vision survives in the jungle and is able to produce offspring. The one with a poor vision dies with no offspring. In the end, only those with a perfect sight remain. In this case, only eagles with the best vision and the swiftest grasp remain. However, what would have forced human beings or eagles to form eyes cannot be described with certainty in the first place. Stumbling upon some chemical that alters the DNA cannot produce eyes. The struggle for exis tence may not change the DNA. Paley argued that something that happens by chance could produce â€Å"a wart, a mole, a simple, but never an eye† (5). A pimple is possible because it is not an assembly of different parts performing one function. In all cases, the argument is the same. A stone is not an assembly of parts. It can be formed through chance. Human beings would like to develop wings to fly. When the struggle for existence can be used as a cause for the prevalence of the more specialized forms, there is no evidence of struggle among celestial bodies arranged in sustainable patterns. Isaac Newton’s thought is that â€Å"the stars are so evenly spaced throughout the heavens and cannot be understood without reference to God’s intentions† (â€Å"Darwin, evolution and modern history: Dar Rev 2014 Slides Living 1† 7). One would wonder what made the stars evenly distributed that they do not collide or merge to become one huge body. They do not st ruggle to exist. It is similar to Paley’s argument where an assembly of different parts results in a system that functions together harmoniously. They cannot assemble by chance without the outcome of an accident. The outcome of an accident is likely to involve a waste. Waste may include parts that do not add value to the functioning of the system. According to Darwin (8), unused parts are eliminated through time.Advertising We will write a custom term paper sample on Philosophy Issues: Paley’s Argument of Eye and Telescope specifically for you for only $16.05 $11/page Learn More Organic fossils need to be studied similarly to the rocks. Whewell discussed that â€Å"the fossils and medals found under city ruins are to be used in the same spirit and purpose† (500). Scientists face the problem of creating a link between stages. For example, the small gradual changes from Homo Habilis to Homo Erectus. Lyell explained that it would have been possible if â€Å"it was part of the plan of nature to preserve an unbroken series of monuments to commemorate the vicissitudes of the organic creation† (34). Scientists have tried to develop a link between different stages in the evolution of mankind. However, there are millions of species that would need a similar linkage. Both Darwin and Paley base their argument on the vertebrates, which have similar body structures in terms of bone formation and body functions. However, the two authors differ on the issue of the origin of species. Paley holds that a similar body structure is a sign of contrivance, which assures the existence of a designer. Darwin uses a similar body structure to infer a common origin. Paley gives a valid argument that an assembly of different parts cannot occur by chance. Darwin’s theory is left with the difficult task of proving how new parts are encrypted into the DNA of young ones because they may not be of generic value (Darwin 12). The s olar system is an assembly of celestial bodies that do not struggle to exist. One would wonder what made the planets develop different masses and atmospheric characteristics if they have the same origin. II. â€Å"It is remarkable how Darwin recognized among beasts and plants his English society with its division of labor, competition, opening up of markets, ‘inventions’, and Malthusian ‘struggle for existence’ —with Darwin the animal kingdom figures as a bourgeois society.† (Karl Marx in correspondence with Friedrich Engels.) Darwin recognized that among beasts and plants there is a division of labor. Plants provide animals with food and oxygen. In return, animals provide carbon dioxide and manure for plants (Marx and Engels par. 2). There is competition whenever beasts have an interest in the same resources. Lions will kill hyenas to reduce competition for meat. Wolves and cheetahs will target the same animals for food. The same competition occurs among human beings when there is a conflict of interest. Division of labor may also occur in animals of the same species. For example, male lions may guard the boundaries and lionesses may specialize in hunting. There is a great division of labor among human beings. Division of labor increases productivity among human beings.Advertising Looking for term paper on philosophy? Let's see if we can help you! Get your first paper with 15% OFF Learn More The farmer has ample time to carry out his duties as a result of taking his children to school. Some animals feed while others watch out. It allows those that feed ample time to find the best food and adequate quantities. It also eliminates distraction from those that are on the lookout for predators. According to the statement, the struggle is an occurrence of chance emerging from overpopulation and the struggle for existence. It leads to the invention in animals as in mankind. As a result of the struggle and invention, a baboon finds out that it can be more satisfied by feeding on a single flamingo rather than plant shoots. However, there is difficulty in catching flamingoes. Opening up of markets is where animals will go further than usual in such food and water. During periods of scarcity, animals may widen the boundaries in which they search for food. Plenty of food in an area may also invite animals from far regions. In English society, merchants were known to bring supplies o f goods that were scarce in England. In return, they would export those that are in plenty. In the animal kingdom, animals have several options among different animals that they can hunt for food. The ones found in plenty are easily killed. They will be frequently hunted until their numbers are reduced. Paley (7) argued that it is a system to prevent overpopulation. In business, inventions come as a result of trying to gain a competitive advantage over other businesses. In the animal kingdom, the invention provides better knowledge that allows an animal to use less effort in the struggle for existence. The need for invention comes as a result of competition. The propagation of species is such that animals of the same species have certain advantages over other species different from their own. Darwin (59) argued that there is intense competition among animals of the same species because of the similarity of abilities. The differences among species create a form of divided labor. Anim als of different species tend to target different parts of the same resources. Their abilities are increasingly being adapted for the different resources they target. The division of labor among species reduces the struggle for existence and increases the chances of survival. A giraffe feeds on trees and a gazelle on the grass. The height of the giraffe and its kicks prevent a lion from reaching its throat easily. The gazelle’s speed is its best rescue. Each species survives, according to their different abilities. Within the species, those which display stronger qualities of their competitive abilities can propagate their genes. Competition emerges from seeking the same resources and from overpopulation. Paley (7) argued that â€Å"pain teaches vigilance and caution, gives notice to danger, and excites those endeavors which may be necessary to preserve the species† (7). As a result of scarcity of resources brought about by overpopulation, the proletariat would turn ag ainst the bourgeoisie. Hume (5) described a situation where insects can molest lions despite their strength. The Malthusian theory predicts the intensification of the struggle for existence as a result of overpopulation. In the animal kingdom, the search for green plants intensifies as the population of herbivores increase. However, their population is kept at a sustainable number by the carnivores. Mankind has been able to reproduce at a high rate after reducing the struggle for existence from the struggle of necessities to the struggle for additional pleasures. The bourgeoisie society has been described with a continuous class struggle for necessities and enjoyment (Marx and Engels par. 4). Engels draws a difference between the bourgeoisie struggles in mankind from that of animals because animals only gather finished products and are more concerned about necessities (Marx and Engels par. 4). Some animals may show an indication of enjoyment too. Birds satisfied with the necessity o f food and water may bathe in the soil as a form of relaxation. The bourgeoisie is known as a society where everyone seeks his own benefit (Marx and Engel par. 13). The animal kingdom is similar. Animals may also be friendly to their own kind once they have satisfied their individual needs. The struggle where everyone seeks to satisfy their individual needs leads to those who are more adapted to the changing conditions to survive when the weaker of their species are wiped out by scarcity. Division of labor may have resulted in better-performing parts. The different body parts form systems that are better adapted for their function. Different species also specialize in areas that provide a better chance of survival. Adam Smith claimed that a â€Å"workman not educated to this business, has by the division of labor rendered a distinct trade† (8). It is the situation when a workman gains skills through practice rather than education. It is similar to Darwin’s view that di fferent species have gained competitive advantages by repeatedly using certain abilities (Darwin 8). The abilities that provide a species with its distinction become a common feature among the offspring that will be able to survive in the struggle for existence. Marx and Engel (par. 2), in the statement, were not surprised that the same theory used in history could be used in natural sciences. At a glance, human beings may appear free from the struggle for existence. Invention and innovation have allowed mankind to live in numbers that would be considered overpopulation if human beings lived in their natural state. A closer look at animals, one realizes similar struggles as those of mankind. The search for new markets and division of labor are inventions that tend to create an advantage over individuals and nations. The individual that innovates becomes dominant. Historically, the most successful men were able to sire more children than the less successful men. Currently, the trend has changed because men are afraid to have more children alarmed by economic difficulties. It goes back to Paley’s argument that the struggle creates an awareness of danger, which reduces overpopulation in human beings. Today, in a more developed country like England, there is hardly direct combat in the struggle for resources. However, the struggle for existence has not stopped. It will be evident in firms that restructure to remain in the market place. There are individuals who develop rare technical skills, which allow them to tap into resources that are hardly available to the majority. Animals as well may develop rare skills that allow a species to tap into resources unreachable to others. Works Cited Darwin, Charles. The Origin of Species by Means of Natural Selection, or, The Preservation of Favored Races in the Struggle for Life. 6th ed. 2009. New York: Cambridge University Press. Print. â€Å"Darwin, evolution and modern history: Dar Rev 2014 Slides Living 1†. Web. Hume, David. Dialogues Concerning Natural Religion (1779). Passages distributed in class. Lyell, Charles. Principles of Geology [1830-1833, vol. 3], London: John Murray. Passages distributed in class. Marx, Karl and Friedrich Engels. Marx-Engels Correspondence 1875: Engels to Lavrov 12 November 1875. n.d. Web. Paley, William. Natural Theology or, Evidences of the Existence and Attributes of the Deity, Collected from the Appearances of Nature. 12th ed. 1809. London: Fauldner. Darwin-online Organization. Web. Smith, Adam. An Inquiry into the Nature and Causes of the Wealth of Nations [1776], 5th ed. 1904. London: Methuen. Passages distributed in class. Whewell, William. History of the Inductive Sciences (1837). Passages distributed in class. This term paper on Philosophy Issues: Paley’s Argument of Eye and Telescope was written and submitted by user Paris Wilcox to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

Beliefs in Society essays

Beliefs in Society essays And any creature that shall seem to be human, but is not formed thus is not human. It is neither man nor woman. It is a blasphemy against the true Image of God, and hateful in the sight of God. (pg.13) A society is a structured community of people bound together by similarities. The novel The Chrysalids, by John Wyndham, is about the struggle of surviving after several hundred years of radiation, due to the nuclear holocaust. What is left of civilization is the three surviving societies, the Waknuks, the Fringes, and the Sealanders. The Waknuks are governed by religious beliefs, and consider anything that is not in the true image to be a blasphemy to God. The Fringes are all the mutants that were once living at Waknuk but then abolished from Waknuk since they were distinguished between the norms . The Sealanders are far away from Waknuk and the Fringes. They are more technologically advanced the rest of the societies and they all posses the ability of thinking-shapes. The three societies, the Waknuks, the Fringes, and the Sealanders have similar and different beliefs on the way they live life. The Waknuk society was originated by Elias Strorm. Elias Strorm had two boys, Joseph and Gordon. Gordon was the older one, and he was the one to inherit the town of Waknuk, but he began to develop abnormality and was sent off to live in the Fringes by himself. Therefore Joseph inherited Waknuk, and ever since his father died, he was the leader of the town. The reason Gordon was abandoned by his family was because the Waknuks believe that God made everyone in his own image and if you were not in the true image you were consider to be created by the Devil. The Devil sends Deviations among us to weaken us and tempt us away from Purity. That us what the inspector told David about Sophie about her six toes. The Waknuk society is inconsiderate because they dont believe mutants ar...

Interfaces, Database Integration, and Controls Essay

Interfaces, Database Integration, and Controls - Essay Example Software interfaces can be termed as the codes and languages in which applications use to interconnect to each other and also with the hardware devices. Programs or application that run on the operating system need to connect through streams, while in object oriented programs, the applications connect through methods. User interface are the components of the computer that enable communication between the computer and user (Wolpaw et.al, 2012). Database integration includes joining information existing in different sources and providing the operators with a similar understanding of these information. This technique became important in numerous circumstances which included both scientific and commercial. This integration enables the user to be able to access any piece of information from anywhere whether at home or at the office and be able to use the data in almost any application (Doan et.al, 2012). Controls are separate devices, chips or an accessory card, which interfaces with devices that feed data into or out of a computer. It can be a controller on a peripheral device which pedals the processes of that device or connections among two components of a computer. A controller in desktops might be a single-integrated circuit found on the motherboard or peripheral devices whereas a device integrated into the external devices in supercomputers is also a controller (Hellerstein, 2004). Information should be safely secured and easily available whenever needed for examination. Thus Interfaces, Database Integration, and Controls play a major part when it comes to management of data. The interfaces need to direct the operators on how to get the best outcomes from the computer system while database integration will help users to have access to information they need from anywhere as long as they have access to the database. Lastly the controller’s

Why do Economies Grow Essay Example | Topics and Well Written Essays - 500 words

Why do Economies Grow - Essay Example Here, the capital essentially includes all production tools. More work was done by other researchers after Solow to expand his mathematical model, as a result of which, certain other factors were also found to be the driving factors of a nation’s economy. Such factors include but are not limited to human capital and land. The validity of information generated by Solow can be estimated from the fact that he was awarded â€Å"the 1987 Nobel Prize in economics† (Hardesty, 2011). Technology plays an important role in boosting the economy of a country. The following chart shows how the listed countries’ economy grew from 1973 till 2007: Economic growth in different countries from 1973 to 2007 (Kenworthy, 2011). It can be seen in the chart above that certain countries showed a greater growth of economy as compared to others in the mentioned duration. â€Å"One reason is â€Å"catch-up†: partly because they could borrow technology from the leaders, countries tha t began with a lower per capita GDP tended to grow more rapidly† (Kenworthy, 2011). Sustainability of economic growth depends on several factors like the property market, mortgage trends and interest rates etc.

Life Style Inventory Essay Example for Free

Life Style Inventory Essay As I look at my results from the Life Style Inventory my primary thinking style that I scored the highest in was the affiliative style at 83%. As I looked deeper at this style it fit me to a tee. I have always been warm and sincere because I always try to see the best in other people. My interpersonal relations with peers and subordinates alike have allowed me to be trusted and liked by others. This has helped me to be both diplomatic and tactful in my decisions as a manager. My genuine concern for people and ability to accept change easily has placed me in a leadership position many times just because I am able to listen and feel that people are more important than things. Next we will be looking at my backup personal thinking style and I had a two way tie between Self- Actualization and Humanistic- Encouraging at 75%. In the Humanistic-Encouragement thinking style I love to teach and enjoy sharing knowledge with others. I am very supportive of others and encourage others to strive for excellence and to think for themselves. As a good listener I am supportive of others and always willing to take time with people. Now with Self-Actualization I am a creative thinker and can communicate easily and very aware of my own feelings. I tend to be optimistic and realistic with my judgments and I have a high level of personal integrity. As I look at these three thinking styles I completely agree with them as my strengths. I have always been the equalizer and the manager called upon to best deal with conflict. I value my employees, focus upon perceptions, and know their needs. Honor and Integrity direct my morale fiber and I hold respect as being the most important element that people need in their lives. These styles are all important for training and developing a strong working team and have made me valued as a good leader and well thought of by my peers. When I at look at any of these thinking styles that may be limiting me I would have to turn towards Approval. I feel that I can be overly trusting too fast and too agreeable with others opinions. Whether you are overly seeking approval or accepting others values too much this style can work against you and be called being too generous to a fault. I feel that I would like to have better control upon being overly sympathetic with people. I have the ability to give people too many chances to improve or correct their behavior when in all actuality it would have been better to have cut our losses after the first counseling session failed. Giving an employee a fair chance is fine but when I go too far it can appear like favoritism or special treatment. If the employees know that you are overly sympathetic they will also play to this weakness to get out of the hot seat. The team likes you and shows approval on the surface but really they do not respect you and view you as a push over. I sometimes fight this behavior because there is a fine line between the perception of not caring and being not sympathetic enough and being overly sympathetic to a fault. I always know that you cannot please everyone as a good leader and some may even oppose you, but if upper management sees you as being too soft and overly sympathetic then you are not taking care of the business. Impact on Management Style: Planning When I think of my primary and back up styles of thinking I can see the affiliative style having me motivate my team through using praise and friendliness. This can help me in the planning phase by getting valuable input from my team through building trust and meaningful relationships that are reciprocated. This helps us to feel like a team and make informed decisions from data collected by our team and helps us to build a sound plan of action. Through self-actualization I would use my sound judgment and optimistic and realistic nature to set solid goals. When making company plans my humanistic-encouragement style would have me utilize my knowledge of the company’s needs and the teams needs to make good plans. Being a good listener also makes planning a lot easier. Organizing With my ability to develop and teach others and listening to my team while easily adapting to change I am able to better organize my team by setting SMART goals and using my communication skills to keep my team well informed. By thinking outside of the box and using my creative and original thinking skills I will be able to keep all of my team on the same page with our eye on the target of success. Leading My primary and backup styles give me an excellent leadership skillset in that I listen and set own goals, but I also understand how people feel and make sound judgments. My genuine concern for others and communication skills not only give me great leadership skills but my ability to use my intuition to read people allows for proactive decisions to be made. Perhaps it is my ability to be diplomatic and tactful and see the best in others that allows for me to be respected and well thought of as a leader. Controlling Some people use intimidation and threats to control their team but giving them respect and a sense of ownership of their job allows my coaching and development style to allow peer pressure to control our team. The ability to set common goals and encourage our team to think for themselves, gives ownership and control through respect, honor, and integrity. Never asking my team to do what I am not willing to do myself and giving them the resources and tools needed to be successful keeps the respect and lines of communication open. Genesis of Personal Style: If I was to critically evaluate what has contributed the most to my personal styles it would have to be my family and growing up in the restaurant business. Always being in the public eye and dealing with guests face to face gave me a comfort at an early age of being in front of people and taking the time to listen and enjoy people. I was in the entertainment business and learned how to set goals and run a business by watching the controllable costs and giving quality service so that our guests would return. I developed understanding, humility, confidence, and personal integrity from my family. Growing up in my community and having great friends and families really made a big difference with being sincere, warm, and open. It was sports and Boy Scouts that offered discipline, commitment, and goals to my life. From my relationships built in high school and the Navy to the relationships built in business I continue to learn and strive to improve my styles to compliment my ability to lea d. Conclusion and Reflection: As I look at my Constructive skills I see how my developments of Affiliative, Humanistic-Encouragement, and Self-Actualization styles have all contributed to my ability to be a good leader. My intuitive ability to read behavior and develop teams is second nature to me and my ability to listen and be real to my team has earned me their respect. Now my Passive and Defensive styles show me that dependent and conventional may be an area to watch out for but I felt that approval was the area that concerned me the most. Specifically it may be too easy to become overly sympathetic and this could lead to being overly generous to a fault. Looking at my Aggressive and Defensive Styles I look at oppositional and competitive styles and giving me the ability to question everything and always inspect everything before making a decision, be the best at what we do, and set the benchmark of our industry. I feel that the LSI shows us our strengths and opportunities and while we are always striving to improve our behaviors we must look at our beliefs in why we find our behavior acceptable and seek to make changes here, because in order to improve one’s behavior we must change our beliefs first. I feel that I would like to improve upon being less sympathetic and watch my procrastination by setting clear boundaries a staying to the specific rules. It is important for me not to put things off for tomorrow if I can do it today. I also would like to not get overly involved in team members personal issues that are affecting their work. This exercise helped me to look closely at how other styles can overshadow the positives of other styles and be counterproductive. This has helped me because as I see that several of my styles help me to be a good leader but now I have a better understanding on what other styles can limit my constructive styles ie, if I have a high affiliative and a high power style then I would desire to have close friendships but try to control and dominate these friendships which will result in a negative relationship. Overall this has been a great tool for my future in management and beter understanding my thinking and behavior process.

Graduation Speech: The Climb :: Graduation Speech, Commencement Address

Good evening family, friends, teachers and fellow graduates. This special night marks our achievement over the past thirteen years. Tonight we come to the top of a mountain in our lives and look ahead to the numerous more to come. It seems like just yesterday we were eighth graders in middle school, wishing we were twelfth graders in high school. (You have to remember that back then we didn't know if a freshman meant you were in twelfth grade or if a junior meant you were in ninth.) We've definitely come a long way to be where we are today. Being students at Wilson, "The School of Pride," has helped us all with our climb over Mt. Education. Learning the basics to climb Mt. Education didn't just start in high school; it began a long, long time ago. Our first experience with the climb started out in our six years of base camp, formally known as elementary school. The next stage in our climb was when we were able to climb the part of the mountain with the gentle slope. The smooth slope of the mountain took us a whole three years to accomplish. As you have probably guessed, the gentle slope was middle school. These were the steps we took to get to our third stage in our climb of reaching the peak of Mt. Education, also known as high school. It all began at freshmen orientation when we learned just how much control we would have over our educations here at Wilson. We also discovered that we not only would be choosing the classes we took, but the teachers as well. Next, from a chant that was yelled at us from the seniors in our first pep assembly, we learned that seniors do rule the school. During the pep assemblies we also learned how to show our school pride and spirit. Overall, in our first year here at CHS we encountered many faculty members and students that would help us on our journey up the mountain of education. Throughout our years of high school we have perfected our methods of climbing Mt. Education through experiencing many first times together. To start things off there was the first Friday night varsity football game at the stadium. We also had dances that were actually cool like homecomings and tolos. We even experienced many new things in the classroom such as writing research papers, taking extremely difficult tests and learning a foreign language.

Economics Essay

Economics is regarded as one of the earliest and arguably most essential of the social sciences. While not exactly a science as the term science is widely known as today, there are similarities that allow for its classification as a social science. One of these similarities lies in the roles that economists play as social advisors vis-a-vis the role of scientists. As a policy advisor, an economist is expected to make reliable predictions and forecasts with regard to the policies to be instituted. Since the expectation is that of reliability, there is a large amount of precision required which is similar to that of the scientific method employed by scientists. The use of the null and test hypothesis as a scientists has an application for policy advisors in coming up with these forecasts. No policy advisor can make any suggestion without any empirical data or figures in the same way that no scientist will present a dissertation without any evidence. While these may make the roles as policy advisors and scientists similar to a certain extent, there are also differences depending on the situation the economist is placed in. As a policy advisor, an economist is expected to present reliable information in order to aid in the formulation and implementation of policies, while these may have a certain amount of scientific evidence (so to speak), there is a certain reality check which takes place that demands that the economist take the most viable option. The most scientifically correct approach may not always be the most viable option and this is what an economist must deal with when taking on the role of a policy advisor as opposed to when an economist takes on the role of a scientist in policy making, which more often than not entails that only the facts be presented in a scholarly manner without particular attention to its viability under different constraints.