If you study you will fail

Hi,
The bellow theorem will tell you that "if you study for exam you will fail"

Normal theory :
case1:If you study you won't fail.

eq-1: study=don't fail;
case2:If you won't study you will fail.
eq-2: don't study=fail;

add eq-1&eq-2;
study+don't study=don't fail+fail;

select common factor out;
study(1+don't)=fail(1+don't);

cancel (1+don't) on both side

So finally you will get

study=fail;

Hence the theorem was proved.