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Formal proofs present the oh-so-mathematical evidence in two columns: one for the statement they are claiming is true, and the other for the reason...

Indirect proofs (or proofs by contradiction) prove their conclusion by showing that the opposite cannot be true. You can use this in math and in ar...

If you already know what a conditional statement is, then you're smarter than you look. And boy do you look smart.

Mathematical Reasoning Drill 6, Problem 1. The mathematical operation needed to figure out the amount of carpeting in square feet that Sheila...