The problem is not if the humar brain is/isn't perfect (compared to what?). The matter here is that the question is not mathematically strict and so the reader

The problem is not if the humar brain is/isn't perfect (compared to what?). The matter here is that the question is not mathematically strict and so the reader is free to interpret it as he pleases, and multiple solutions spawns naturally. The teacher is very mistaken trying to assert a unique solution.