There is no point in asking absurd
questions which, in the nature of things, cannot be answered, and then setting a wail about
imponderables. A better approach, better because it works, is to invite the scientist to
examine the problem situation from every possible slant, reshuffling it as it were, in search
for a commensurable approach. The scientist will look for some critical feature of the
situation that is on the face of it measurable, and he will try to find a metric which fits it.