Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Engineering Mathematics Mathematical Logic Propositional Logic
“If X, then Y unless Z” is represented by which of the following formulae in propositional logic ?
1
\(\left( {X \wedge Y} \right) \to \neg \;Z\)
2
\(\left( {X \wedge \neg \;Z} \right) \to Y\)
3
\(X \rightarrow (Y \wedge \neg\;Z)\)
4
\(Y \rightarrow (X \wedge \neg\;Z)\)