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
- Neutrosophic logic
- Modal logic
- Paraconsistent logic
- Quantum logic
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.