Truth tables
The truth values for a logical construction are given unambiguously by truth tables, one for each connectivesuch as “and” and “or”. For example, from the tables shown here you can see immediately that if P is true and Q is false, then “P and Q” is false but “P or Q” is true.
P Q P and Q
T T T
T F F
F T F
F F F
P Q P or Q
T T T
T F T
F T T
F F F
*copied from various sources fair-use policy


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