NTA-NET (UGC-NET) Philosophy (03) Logic-Formal and Symbolic-Decision Procedures Study Material (Page 15 of 18)
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Logical Equivalence
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Logical Equivalence
- Before learning about logical equivalence, it is important to understand the concept of material equivalence.
- Material equivalence is represented by the symbol .
- is called the tribar or the three-bar sign and deals with bi-conditional propositions.
- Mat…
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Truth Tables to Determine Tautology of Bi-Conditionals
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(P ⊃ Q) ≡ (~Q ⊃ ~P)
The truth table of the above statement would be;
p | q | |||||
T | T | T | F | F | T | T |
T | F | F | T | F | F | T |
F | T | T | F | T | T | T |
F | F | T | T | T | T | T |
So, the above statement is a tautology
P ≡ [P • (P V Q) ]
- The truth table of the above statem…
… (182 more equations) …
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