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    A logic that forbids DS must either reject classical taut... — Carmelics
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    Challenges→Anderson and Belnap's relevance logic, which enforces VSP, requires rejection of the disjunctive syllogism (A ∨ B, ¬A ⊢ B), a inference form Lewis and others argue is indispensable to ordinary reasoning.

    A logic that forbids DS must either reject classical tautologies like (A ∨ ¬A) or accept true conclusions from true premises, undermining its coherence.

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