Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — appears throughout mathematics, including in areas that are completely ...

In a previous post, we considered three of seven "irrational" habits of highly rational people. Here we consider the remaining four, as well as some suggestions for distinguishing the genuinely ...

The importance of recognizing what's rational and what's not If someone was as rational as could be—with sound decisions and many accurate and trustworthy judgments about the world—would we recognize ...