Prepositional logic :1.1

Question

Derive clause (P ∨ Q) from clauses (P ∨ R), (Q ∨ ¬R)
is following statements related to this rule is FALSE?

(P ∨ Q) ⇒ FALSE if and only if both P and Q are unsatisfiable

Comments

P V Q->FALSE.

i think if both values are false then only the whole predicate is true.remaining all cases it is false.

If P=T then P V Q=T and T->F is false.

this is my understanding,what u think??

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ya tht right .  It is previous yr gate question .

What type of english they use i don't get yr .What they want to prove It true or false ?

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@santosh

c thiz

https://gateoverflow.in/99007/propositional-logic-converse

i think if exam is gate thn it leads to false .

i m laughting still 3 minutes . lol :)