Midterm Flashcards
what “evolution” means as it is used in this course
Evolution in this course can be viewed as the claim that over many generations, organic forms (e.g. microorganisms, plants, and animals) change and that distant ancestors greatly differ from most contemporary organisms. For instance, some of our distant ancestors were “ape-like” creatures who were also ancestors of modern chimpanzees and gorillas. If you go back further, the most distant ancestors were single-celled organisms.
what artificial selection is, and why it is important in understanding Darwin’s theory
Selection by humans of animals and plants with the express purpose of producing offspring with those desirable characteristics. It could be used for breeding over several generations. → EG: Large Breasted Turkeys
It is important to understanding the “causal process” of Darwin’s theory regarding evolution and how these characteristics have been shaped throughout time. Darwin’s theory is based on this process. It explains how these changes take place. It severed as model for Darwin. Natural selection is just like that except that humans aren’t doing it.
what three factors are crucial for artificial selection - explain each factor
The three factors are the following:
Variation: Organism’s variation of size, shape, strength, intelligence, docility, etc.)
Inheritance: High probability that if the parent has a particular trait, the offspring will obtain it. (e.g. height, athleticism, intelligence, etc.)
Selection: Humans decide which traits are going to be passed on. Which organisms are allowed to reproduce. (EG: Large Breasted Turkeys)
the insight that Darwin borrowed from Thomas Malthus (15%)
Thomas Malthus’ insights were the following:
With endless resources and no constraints, organisms will keep on reproducing. The insight was that something might stop the process, otherwise we would be knee deep in rabbits. Like starvation, predation, and disease.
the crucial components of Darwin’s Theory of Natural Selection (10%)
The crucial components in Darwin’s Theory of evolution are:
Variation, inheritance, and natural, not artificial, selection. (It’s nature that decides which species will survive by their adaptability.)
what plays the role in natural selection that human breeders play in artificial selection – in your answer you should include some examples (20%)
In Darwin’s theory, selection plays the role that humans play in artificial selection
In Darwin’s theory, natural processes like predation, disease, finding and competing for mates plays the role that humans play in artificial selection. EG: Rabbit that runs faster or Giraffes that have longer necks
Darwin thought that inheritance was a blending process. Why was this a problem for his theory? (15%)
The notion of inheritance “blending” is problematic because blending would quickly eliminate variation within a species. Without variation, natural selection wouldn’t have anything to work on. There would be no natural selection in any group where everyone is genetically identical.
Explain “Descartes’ Challenge.” What was Descartes’ answer to the challenge? Explain the theory, known as “Cartesian Dualism,” that Descartes proposed in response to his challenge. (20%)
Descartes Challenge: Descartes said that the mind and the body are separate things. Minds are the kinds of things whose nature enables them to have consciousness, intentionality & rationality. While matter, the body, is the kind of thing whose nature is to obey the basic laws of physics. Thus, how could a physical thing have consciousness, intentionality & rationality?
Descartes Answer: He can vividly and clearly conceive of his mental states (his thoughts, perceptual experiences, pains, etc.) existing apart from his body, and he can also vividly and clearly conceive of his body existing apart from his mental states. From this, Descartes concludes, his body and his mind are in fact distinct. They are different things.
an explanation of the idea that we can build a machine that follows the rules of logic (20%)
Since symbols are physical objects with physical properties, we (and nature) can build devices that recognize & manipulate symbols in ways that depend only on their “form” (i.e. their shape or some other physical property). Thus we can build a machine that follows logical rules and generates logical proofs, even though the machine does not know what the symbols it is manipulating mean. To the extent that rational thought (reasoning, decision making, etc.) can be captured by formal rules, we can build a machine that engages in rational thought.
Explain why the Computational Theory of Cognition provides a partial answer to Descartes’ challenge. Explain why the answer is only partial. (20%)
It answers how a physical system can think. Physicals systems can think and perform logical operations likes our brain. If WE can build such a machine, NATURE can build one too. The theory shows us how rational thought is possible in a physical system and thus it answers (part of) Descartes’ challenge. We don’t need to posit special “mind stuff” to explain how thinking is possible. Physical systems can think. It does not explain consciousness.
Explain why Functionalism and the Computational Theory of Cognition form a natural unit. (20%)
The major challenge of the Computational Theory of Cognition is to specify the rules that enable rational thinking and decision making. These rules specify WHAT is done – how the symbols are manipulated – but they do not tell us what physical mechanism is doing the manipulating. So the rules are functional rules. A computer program is a functional specification of the information processing activity of the computer running the program. The goal of a Computational Theory of Cognition is to discover the information processing programs (algorithms that are functional theories) that the human brain is running and how they interact.
Give a clear, accurate explanation of the idea of “multiple realizability”. Your answer should include an example. (20%)
A functional description of something can be mapped or “realized” onto many physical descriptions. For example, thermostats being built out of many different systems.
Explain the functionalists’ account of the nature of mental states. (20%)
Functionalism maintains that mental states and processes (e.g. thoughts, emotions, reasoning) are functional states and processes and thus that mental states and processes can be “realized” in many different ways.
What is a mental module? (10%)
Special purpose mind/brain mechanisms, like the Language Acquisition Device (LAD), are often called “mental modules”. Though Chomsky prefers to call them “mental organs” to stress the analogy with the rest of our biology. Our body is FULL of special purpose systems (organs): EG: Eyes are great for seeing, but no good for hearing or digesting food; the pancreas secretes insulin, but it can’t be used to throw a spear, etc. etc.
Give an example (2) of a mental module that has been posited by evolutionary psychologists. (10%)
There are specialized systems for grammar induction, for face recognition, for dead reckoning, for construing objects and for recognizing emotions from the face. There are mechanisms to detect animacy, eye direction, and cheating. There is a “theory of mind” module …. a variety of social inference modules …. and a multitude of other elegant machines.”