valid arguments

Pankaj Joshi asked Jan 20, 2017

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Which of the above argument is valid?

Mathematical Logic
mathematical-logic

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Pankaj Joshi asked Jan 20, 2017

Pankaj Joshi

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commented Jan 20, 2017

only 1st argument is valid

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Pankaj Joshi

commented Jan 20, 2017

thats what I thought but its not the solution

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Sushant Gokhale

commented Jan 21, 2017

For 1st,

Take some 'x' as false and try. LHS = false and RHS=true. So, invalid.

SImilarly, others.

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none are true.

nitish1995 answered Apr 5, 2017

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is this argument valid: {P->Q , Q->R}-> R'

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ram_18051996 asked Jun 2, 2017

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This problem is related to Rule of inference and valid argument .
premises are - A A → ( B ∨ C ) B → ¬A conclusion - C is valid or not ?

premises are -AA → ( B ∨ C )B → ¬Aconclusion -C is valid or not ?

ram_18051996

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ram_18051996 asked Jun 2, 2017

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