Philosophy Lexicon of Arguments

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General validity: within a calculus a formula that is satisfied by any interpretation (variable assignment with expressions for objects) is valid. See also satisfaction, satisfiability, interpretation.
 
Author Item Excerpt Meta data
Mates, Benson
 
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Validity I 85
not valid / valid / Mates: E.g. Fa - V x Fa. - - (Fa > Ga)> (~Fa > ~ Ga) - - (x) (Ey) Fxy> (Ey) (x) Fxy - here you can specify interpretations, where the statements are false - Valid: j is valid if j is a consequence of the empty set - I 88 trivially true, since L has not got any elements.

Mate I
B. Mates
Elementare Logik Göttingen 1969

Mate II
B. Mates
0226509869 1981


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Ed. Martin Schulz, access date 2017-04-28