Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Rationality is what keeps us sane in the messiness of life. Being able to stay rational through a difficult time, or just for as long as a simple argument, is a sort of safety vest we can wear to not ...

THIS DISCUSSION involves people with a large range of shared aspirations and commitments; in some cases at least, friends who have worked and struggled together for many years. I hope, then, that I ...

In a posting at The Big Picture, Barry Ritholtz says my article about the central role rational irrationality played in causing the financial crisis doesn’t make any sense. Ritholtz writes: “ ...

Suppose you toss a coin and get four heads in a row – what do you think will come up on the fifth toss? Many of us have a gut feeling that a tails is due. This feeling, called the Gambler’s Fallacy, ...

I met the most rational person I know during my freshman year of college. Greg (not his real name) had a tech-support job in the same computer lab where I worked, and we became friends. I planned to ...

Rational artificial intelligence sounds simple on paper: build systems that make sensible decisions based on goals, evidence, and logic. Yet the moment you try to define what rational means, you run ...