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Probability : Definition and Notation, Probability Formulae
Calculating Probability without the Formula
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Logic, Sets and Probability

Logic and Truth Table Summary

Propositions are represented by p : q : r : etc.

 

negation

Two propositions can be connected by logic symbols to give a new statement (proposition)

 

conjuction

 

disjunction

 

Exclusive disjunction

 

implication

The compound proposition is only false when the first proposition is True and the second False.

 

equivalence

 

summary

 

Tautology: A statement that is true whatever the truth values of the original propositions.

 

Contradiction: A statement that is false whatever the truth values of the original propositions.

 

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