Akman (2017) argued that our logic textbooks should be burned, since they present a propositional analysis of necessary and sufficient conditions that leads to a contradiction. According to Akman, we should instead adopt a first-order analysis where conditions are interpreted as one-place predicates. I will argue that (1) Akman’s argument fails to show that the propositional analysis of conditions leads to a contradiction, since the negation of a conjunction is not a conjunction with negated conjuncts, but rather a disjunction with negated disjuncts; (2) we can still infer a contradiction from the propositional analysis of conditions by negating two propositions individually and using them to form a conjunction that is contradictory; (3) Akman’s interpretation of the first-order analysis does not accurately represent most attributions of conditions; (4) a proper representation of most attributions of conditions in the first-order analysis also implies a contradiction; (5) the propositional and the first-order analysis of conditions imply a contradiction because they use the material conditional, but they can be formulated with other conditional connectives that prevent this consequence; (6) we should still maintain the material conditional in both analyses and explain away its counter-intuitive character as the result of an epistemic bias that favours intentional evidence over extensional evidence, and acceptability conditions and criteria of truth over truth conditions.
Keywords necessary condition  sufficient condition  intensional evidence  extensional evidence  material conditional
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