LessonsConditional Propositions: Connectives, Disjunctions and Their Main KindsQuiz

Two events may occur at the same time, tempting us to treat them as logically linked. “Prayer is taking place in the mosque” and “a shop is open in the market” may both be true, without either following from the other.

Co-occurrence is an observation. Entailment requires an actual relation connecting the propositions. The former does not establish the latter.

Classical logic examines the relationship within a conditional precisely so that coincidence is not mistaken for an argument.

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Simultaneous truth does not establish necessity

Conditional Propositions: Connectives, Disjunctions and Their Main Kinds

Two events may occur at the same time, tempting us to treat them as logically linked. “Prayer is taking place in the mosque” and “a shop is open in the market” may both be true, without either following from the other.

Co-occurrence is an observation. Entailment requires an actual relation connecting the propositions. The former does not establish the latter.

Classical logic examines the relationship within a conditional precisely so that coincidence is not mistaken for an argument.