Let's assume for a moment that someone believes that human beings can "perceive reality". Adding the axiom that "evolutionary theory is mostly correct" (which doesn't seem too bad), one concludes that because "perceiving reality" would require a large expenditure of energy, it must be necessary in order for optimal fitness, since if we are to believe it is with us, we must have evolved to do it. Similarly, walking is "necessary". NB. "Perceiving reality" seems to be defined by the person writing the question, which is a conflict of interest.
(I leave out the interesting but undesirably complex hypothesis that some strategies exist which do not involve perceiving reality but are not accessible by evolution for unspecified reasons)
This argument takes off by constructing a fitness function where perceiving reality is unnecessary. It then concludes by construction that the perception of reality won't evolve. However, there is no real "theorem" here: all that has happened is that it is now encoded in mathematical language that this belief could be true or false.
Let's assume for a moment that someone believes that human beings can "perceive reality". Adding the axiom that "evolutionary theory is mostly correct" (which doesn't seem too bad), one concludes that because "perceiving reality" would require a large expenditure of energy, it must be necessary in order for optimal fitness, since if we are to believe it is with us, we must have evolved to do it. Similarly, walking is "necessary". NB. "Perceiving reality" seems to be defined by the person writing the question, which is a conflict of interest.
(I leave out the interesting but undesirably complex hypothesis that some strategies exist which do not involve perceiving reality but are not accessible by evolution for unspecified reasons)
This argument takes off by constructing a fitness function where perceiving reality is unnecessary. It then concludes by construction that the perception of reality won't evolve. However, there is no real "theorem" here: all that has happened is that it is now encoded in mathematical language that this belief could be true or false.