On the proof of the supposed evilness of girls

T. Komplexify
Weizguyy Institute of Smart Axes

Abstract

In this article, we discuss the classic proof that girls are evil. The author will briefly discuss the origins of the problem and review the classic proof. The author then indicates a mathematical flaw in the argument, invalidating the statement. The article concludes with a revised and corrected statement of the result.

I. Introduction

I recently received an email discussing the differences between men and women from various mathematical and engineering points-of-view. Most of it was extremely funny, and sooner or later all shall certainly appear within the mathematico-humorist community, properly researched, and appended with standard references in the literature.

However, one portion of the email included a mathematical "proof" of the fact that girls are evil. This proof is doubtless familiar to many readers, having circulated a few times in mathematicians' inboxes. However, for those readers unfamiliar with this well-known proof, we present it now.

II. Statement and classical proof of result

Theorem. Girls are evil.

Proof. It is axiomic in all cultures that girls require both time and money, and any man with either a deficiency in available "quality time" or "disposable income" knows that this a joint-proportion, whence

Similarly, it is has been proved that "time is money" [1], whence

Substitution yields

We also know that "money is the root of all evil" [2], whence

Substituting again yields

Squaring on the right-hand side of the equation yields

establishing the result. Q.E.D.

http://komplexify.com/blog/2006/03/09/on-the-proof-of-the-supposed-evilness-of-girls/