Consider the following two counterfactuals.
If FLT were false, then no argument for it would be sound.
If FLT were false, then Andrew Wiles would deserve eternal fame.
Folks who feel that these statements have different truth values are,
naturally, dissatisfied with semantics that assign them the same
truth value. Impossible worlds provide one way of responding to this
situation. A good resource is Volume 38, Number 4 of the Notre Dame
Journal of Formal Logic (available at projecteuclid.org).
Stephen Pollard
Professor of Philosophy
Division of Social Science
Truman State University
spollard-WoT/K4O+OuU3uPMLIKxrzw@xxxxxxxxxxxxxxxx
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