1) A topologist is a man who doesn't know the difference between
a coffee cup and a doghunt.
2) A statistician can have his head in an oven and his feet in
ice, and he will say that on the average he feels fine.
3) To tell a difference between a mathematicians and an engineer
perform this experiment. Put a kettle full of water in the middle of
the kitchen floor and tell your subject to boil the water.
The engineer will put the kettle on the stove and turn the flame on.
The mathematician will do the same thing.
Next, put the kettle on the stove, and ask the subject to boil the
water. The engineer will turn the flame on. The mathematician will
move the kettle to the middle of the kitchen floor... thereby reducing
the problem to one that already has been solved!