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'".

Irish Cap

1. A cap similar to a beret but different. Sometimes retards call them driving caps or golf caps or other stupid shit, but they're not..

W K Y

1. W K Y stands for Would Know Ya. This evolved as an offshoot of the reply D K Y . It began sometime in the 1970's by local teenage..

Quarter Piece

1. A girl so cute in the face, body, and/or mind that she goes off the scale of 1 to 10. It infers that she is a 25 on a scale of 1 to 10 ..

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If And Only If Edit Meaning