Why The Truth About 9/11 Is Hard To Believe -Mental Model 019

Occam’s Razor

Among competing hypotheses, the one with the fewest assumptions should be selected.


Occam’s Razor Example:

There’s a conspiracy theory that the terrorist attacks on September 11, 2001, were orchestrated by the U.S. Government. This theory assumes the U.S. government was willing to harm thousands of its own citizens, that they hid explosives in the World Trade Centre to help them fall, and that they have managed to successfully hide all the evidence of this conspiracy.

Another hypothesis is that a group of terrorists wanted to attack American and successfully did so by hijacking commercial planes.


This second hypotheses has fewer assumptions. It should be selected.



“The simplest explanation is usually true.” —  William of Ockham


Read More:

> Occam’s razor on Wikipedia.

> Occam’s razor on Farnam Street Blog.