If And Only If

What is If And Only If?

A term used by mathematicians and logicians to indicate that something happens under very specific conditions. Often seen in proofs and theories.

1) The sum a geometric sequence is given by a/(1-r) if and only if |r| < 1.

2) In a bar:

dumped guy: "My girlfriend left me because I told her I loved her!"

other guy: "What a bitch!"

dumped guy: "No, it's all my fault, she's a mathematician, and I should have said 'I love you and only you'".

Cecil'd

1. Came around when an Everquest geek got caught having cybersex cheating on his cybergirlfriend. It later turned out that it was a man he ..

Spinach Waters

1. Diarrhea caused by eating too much spinach in one day. I ate two spinach salads, pizza with spinach, and lasagna florentine; by the nex..

Kim Stolz

1. The hottest lesbian celeberty out there! She's got blue eyes, red hair (cut short and dyed)and a fierce way about her! Jane:"..

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If And Only If Edit Meaning