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.