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The prevailing view in North American philosophical writing seems to be that the phrase ‘just in case’ can be translated into the phrase ‘if and only if’. Consequently, this view holds that the phrase ‘just in case’ is best symbolized by the logical connective known as the biconditional (↔). Now, this seems wrong to me…
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Here’s a tautology in propositional logic: ⊨(P → Q) ∨ (Q → R) Try throwing that into English. Here’s a reading using some propositions I just came up with: “I’ll die if I’m immortal, or I’ll live if I die.” Obviously, neither of those are the case. But this formula, (P → Q) ∨ (Q…