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Ideas for 'Parmenides', 'Essence and Modality' and 'Thinking About Logic'

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2 ideas

4. Formal Logic / E. Nonclassical Logics / 4. Fuzzy Logic

11018	There are fuzzy predicates (and sets), and fuzzy quantifiers and modifiers [Read]
	Full Idea: In fuzzy logic, besides fuzzy predicates, which define fuzzy sets, there are also fuzzy quantifiers (such as 'most' and 'few') and fuzzy modifiers (such as 'usually').
	From: Stephen Read (Thinking About Logic [1995], Ch.7)

4. Formal Logic / E. Nonclassical Logics / 6. Free Logic

11011	Same say there are positive, negative and neuter free logics [Read]
	Full Idea: It is normal to classify free logics into three sorts; positive free logics (some propositions with empty terms are true), negative free logics (they are false), and neuter free logics (they lack truth-value), though I find this unhelpful and superficial.
	From: Stephen Read (Thinking About Logic [1995], Ch.5)