Non-Aristotelian logic

The term non-Aristotelian logic is used for any system of logic which does not divide statements into "true" and "false" statements, as opposed to Aristotle's two-valued system of logic.

See:

• General Semantics
• Fuzzy logic
• Modal logic
• Paraconsistent logic
• Quantum logic

The concept of non-Aristotelian logic was used by A. E. van Vogt as the central theme in his World of Null-A novels, based on his interest in Alfred Korzybski's General Semantics.

One common interpretation of the theory of Bayesian probability is precisely that probabilities describe degrees of belief in propositions.

See also: Multi-valued logic for another article on this topic.

Compare with: Non-monotonic logic where every statement is true or false, but not immutable.

Some developers of non-Aristotelian logics

• Giordano Bruno
• Asger Jorn
• Jan Lukasiewicz
• Stéphane Lupasco