THIS ALSO A SMS I RECEIVED THOUGH THIS IS NOT TRUE ITS FUNNY.
GIVEN
study = don't fail----------------1
don't study = fail----------------2
TO PROVE
study = fail
PROOF
adding (1) and (2) equations
we get
study + don't study = don't fail + fail
study ( 1+don't ) = fail ( don't + 1)
cancelling (1 + don't )
study ( 1+don't ) = fail ( don't + 1)
study = fail
thus the theorem is proved