I'm just starting to learn propositional logic, and I'm hung up on the part of the Distributive Law specifically on the distribution of the $\vee$ (or) operator, where if $P \vee (Q \wedge R)$ then $(P \vee Q) \wedge (P \vee R)$. My problem with the statement boils down to the fact that intuitively in the first clause, regardless of the truth value of $P$, the truth values of $Q$ and $R$ have to be the same as one another (both true or both false), right? However, in the second clause, my understanding intuitively is that if $P$ is true, then $Q$ and $R$ can have different truth values (and do not need to be both true or both false). Hence, I do not see how the Distributive Law equivalence holds, and I'm also having trouble finding where I'm going wrong. Thanks for your help.
2026-04-12 13:31:09.1776000669
Propositional Logic - Distributive Law - Help to Resolve My Conflict of Intuition
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Per @Z.A.K.,
'You ask: "in the first clause, regardless of the truth value of P, the truth values of Q and R have to be the same as one another, right?" Not right. E.g. it could be that P and Q are true, but R is false. Then Q and R have different truth values, Q∧R is not true, but P is true, and since one of the disjuncts is true, the whole disjunction P∨(Q∧R) is true.'