Assume that this holds true:
Study = no fail (1)
No study = fail (2)
This implies:
(1) + (2) –> Study + no study = Fail + no fail
<=> Study (1 + no) = Fail (1 + no)
<=> Study = Fail

Assume that this holds true:
Study = no fail (1)
No study = fail (2)
This implies:
(1) + (2) –> Study + no study = Fail + no fail
<=> Study (1 + no) = Fail (1 + no)
<=> Study = Fail

One Comment
gillar den här bättre:
http://www.anvari.org/fun/Gender/Proof_that_Girls_are_Evil.html