One must not get overly zealous about theories, none the less, the following may be of interest to the blog reader
What is important to note about research guided by theoretical
tenets above is that all behaviour is best explained in terms of underlying
psychological mechanisms that are adaptations for solving a particular set of
problems that humans faced at one time in our ancestry.
Our
immune system is a domain general system in that it allows the body to respond
to a wide variety of pathogens
Elliott
Sober defines an adaptation:
“characteristic c is an adaptation for doing task t in a population if and only if members
of the population now have c because,
ancestrally, there was selection for having c and c conferred a fitness advantage because
it performed task t”
A sea turtles forelegs are useful for digging
in the sand to bury eggs but they are not adaptations
for nest building (Sober 2000, 85). Also, traits can be adaptations without being currently adaptive for a given
organism.
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