Using Proof by Contradiction to Focus your Research

Those who came to genealogy from a science background are likely familiar with “proof by contradiction”—a way to prove a theory by demonstrating that its opposite leads to an insupportable contradiction.[1] Many genealogists use this technique, often implicitly. Whatever the name, genealogists benefit from understanding how to apply the technique to improve research efficiency and focus. Using proof by contradiction, a three-step mathematical example proves the theory that there is no … [Read more...]