If you have no life - and you can PROVE it mathematically.
If you know vector calculus but you can't remember how to do long
division.
If you've actually used every single function on your graphing calculator.
If it is sunny and 70 degrees outside, and you are working on a computer.
If you know how to integrate a chicken and can take the derivative of
water.
If you think in "math."
You've calculated that the World Series actually diverges.
You frequently whistle the theme song to "MacGyver".
You chuckle whenever anyone says "centrifugal force.
If you have a pet named after a scientist.
If you laugh at jokes about mathematicians.
If the Humane society has you arrested because you actually performed the
Schrödinger's Cat experiment.
If you can translate English into Binary.
If you can't remember what's behind the door in the science building which
says "Exit."
If you are completely addicted to caffeine.
If you consider ANY non-science course "easy."
If when your professor asks you where your homework is, you claim to have
accidentally determined its momentum so precisely, that according to
Heisenberg it could be anywhere in the universe.
If the "fun" center of your brain has deteriorated from lack of use.
If you'll assume that a "horse" is a "sphere" in order to make the math
easier.
If you understood more than five of these indicators.
If you make a hard copy of this list, and post it on your door.