Engineers, Scientists, and Mathematicians

An engineer, a physicist, and a mathematician are shown a pasture
with a herd of sheep, and told to put them inside the smallest
possible amount of fence.

The engineer is first. He herds the sheep into a circle and then
puts the fence around them, declaring, “A circle will use the least
fence for a given area, so this is the best solution.”

The physicist is next. He creates a circular fence of infinite
radius around the sheep, and then draws the fence tight around the
herd, declaring, “This will give the smallest circular fence around
the herd.”

The mathematician is last. After giving the problem a little
thought, he puts a small fence around himself and then declares, “I
define myself to be on the outside.”

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