Comments on homeworks thread (including common mistakes)

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Comments on homeworks thread (including common mistakes)
Starting with homework 2:

Problem 2.2 asked about the difference between an agent function and an agent program, in particular how many programs can there be for a given function. There can either be no programs at all, if the function is not computable, see https://en.wikipedia.org/wiki/Computable_function#Uncomputable_functions_and_unsolvable_problems .
If the function is computable, then there is infinitely many possible programs.