Single Idea 19118

[catalogued under 4. Formal Logic / E. Nonclassical Logics / 12. Non-Monotonic Logic]

Full Idea

Test subjects seem to perform very poorly in various reasoning tests (Wason Selection, Suppression Task), suggesting logic has a subordinate role, but this may be using classical logic, where non-monotonic logics would be more appropriate.

Gist of Idea

People don't actually use classical logic, but may actually use non-monotonic logic


G. Aldo Antonelli (Non-Monotonic Logic [2014], 4)

Book Reference

'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [], p.26

A Reaction

Fred Sommers presents his Term Logic (based on Aristotle) as closer to how people actually reason. It is certainly crazy to infer that most people's everyday reasoning is irrational. Induction is highly rational; it's just not deductive.