GATE (Graduate Aptitude Test in Engineering) Philosophy (XH-C4) Classical and Modern Western Philosophy-Logic Study Material (Page 11 of 23)
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The Three Laws of Thought, the Law of Principle of Identity, Non-Contradiction and Excluded Middle
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- Logic is defined as the science of the laws of thought.
- Or, it can be understood as the study which deals with laws of thought.
- There are three laws of thought which are most basic and most fundamental in nature.
- Their use is necessary and a sufficient condition for correct thinking.
- The three laws are;
- The Law of principle of Identity
- The Law of principle of non-contradiction
- The Law of principle of excluded-middle
The Law of Principle of Identity
- According to the law of principle of Identity, if any statement is true,…
… (433 more words, 19 figures) …
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Truth Connectives, Conditional or if … then, Bi-Conditional or “if and Only if”
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There are four truth-functional connectives. They are;
- Conjunction or “And”
- Disjunction or “Or”
- Conditional or “If … then”
- Bi-conditional or “If and only if”
Conditional or if … Then
- Conditional statements are those statements where the word “if” and “then” are inserted within the…
… (585 more words) …
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