Spurious Correlations

Here’s a link to a site that really makes the point – just because there may be a correlation between two variables does not prove that there is a causal link.

Flea Research

There was once this eminent scientist conducting research into how fleas jump. After carefully selecting a candidate flea, the scientist instructed the flea to jump and it jumped. Next the scientist pulled a leg off the flea and again instructed it to jump, and the...