Humans have a cognitive bias for linear functions. One of the ways in which this manifests is that we expect the magnitude of the cause and the magnitude of the effect to be equal. This expectation works well in everyday situations. If you throw a rock, the more effort you put into the throw, the further the rock will travel. The larger the rock, the heavier you expect it to weigh etc. Linear functions, or at least what we perceive us as linear functions, form the basis for everyday life....| Simon Sheridan