Fuzzy logic is a

many-valued logic that deals with reasoning which is approximate not exact.

Fuzzy logic is a form of

many-valued logic in which the truth values of variables may be any real number between 0 and 1, considered to be "fuzzy".

With these valuations,

many-valued logic can be extended to allow for fuzzy premises from which graded conclusions may be drawn.

His topics include rationalism and irrationalism in Poland, the rise of

many-valued logic in Poland, formal metaphilosophy in Finland, an introduction to the history of epistemology, and Polish logic.

A different path taken in the attempt to avoid the paradox leads to the embrace of

many-valued logic. (9) This form of logic boldly declines the simplification offered by two-valued, or bivalent, logic built on a foundation of true/false with an excluded middle.

Hajek introduced BL-algebras as algebraic structures for his Basic Logic in order to investigate

many-valued logic by algebraic means [3,9].

A

many-valued logic capable of handling vague or "fuzzy" concepts (e.g., slow/fast, cheap/expensive, liberal/conservative, cold/hot) allows machines to operate almost as flexibly and "intuitively" as we do.

On the other hand, we might move to a

many-valued logic that explicitly accommodates bottom and choice.

Since these points are presented as self-evident, it is perhaps not surprising that there is no discussion of

many-valued logic or quantum physics.

A better understanding of standards of proof would result from thinking in terms of

many-valued logic and belief functions, however.

Korzybski refers often in Science and Sanity to the "logic of probability," "the

many-valued logic," "the mathematical theory of probability," the "'intuitional' formalism" and "the restricted semantic school" of the Lwow-Warsaw school of mathematical logic and analytical philosophy which flourished during 1895-1939.