Or the deduction by which maximum
pleasure is inferred to be the result of a particular kind
of action may be psychological or physiological; we may
have some general theory connecting pleasure with some
other physical or mental fact, enabling us to deduce the
amount of pleasure that will come from any particular kind
of behaviour. Suppose for example that we hold (as many do)
that the best chance of pleasure in the long run comes from
a perfectly healthy and harmonious exercise of our bodily
and mental functions.