Wittgenstein's ruler: Unless you have confidence in the ruler's reliability, if you use a ruler to measure a table you may also be using the table to measure the ruler.

When we want to do something while unconsciously certain to fail, we seek advice so we can blame someone else for the failure.

Meditation is a way to be narcissistic without hurting anyone

The psychologist Gerd Gigerenzer has a simple heuristic. Never ask the doctor what you should do. Ask him what he would do if he were in your place. You would be surprised at the difference

Never take advice from someone wearing a tie.

A mistake is not something to be determined after the fact, but in the light of the information until that point.

We know from chaos theory that even if you had a perfect model of the world, you'd need infinite precision in order to predict future events. With sociopolitical or economic phenomena, we don't have anything like that.