Same chapter3 marksDifficulty: Medium
Construct the truth table of (p ∧ q) → p and state whether it is a tautology.
Propositional Logic
3 marksDifficulty: Medium
Define a tautology, a contradiction and a contingency, giving one example of each.
Original Khojo Papers practice question — not from a past board paper.
Answer
A tautology is a proposition that is true for every assignment of truth values, such as p ∨ ~p. A contradiction is false for every assignment, such as p ∧ ~p. A contingency is true for some assignments and false for others, such as p ∧ q.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A truth table decides which of the three a proposition is.
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