Beliefs require observations

To form accurate beliefs about something, you really do have to observe it. This can be viewed as a special case of the second law of thermodynamics, in fact, since "knowledge" is correlation of belief with reality, which is mutual information, which is a form of negentropy.

Blog posts

• The Second Law of Thermodynamics, and Engines of Cognition
• What is Evidence?
• The Parable of the Dagger

See also

• Evidence
• Belief update
• Belief in belief
• Free-floating belief