This is only 10 pages. Written by an air force colonel - PhD -
on the dangers of metaphors.
That's where we take the logic from one sphere of knowledge and
apply it to another sphere of knowledge to generate a conclusion
in the minds of the audience.
it's used for good, but it is also misused. and if you don't
feel like reading it, this graphic I snipped form it sums up on
the problem.. *especially* of "what if* stuff but of
metaphors/analogies in general.