| 单词 | formation-rule |
| 释义 | > as lemmasformation-rule formation-rule n. Logic one of a set of rules together specifying which combinations of symbols are to count as well-formed formulas in a given system (opposed to transformation rule). ΘΚΠ the mind > mental capacity > philosophy > logic > predicate or propositional logic > [noun] > well-formed formula > elements of formation-rule1937 well-formedness1947 1937 A. Smeaton tr. R. Carnap Logical Syntax Lang. §1. 2 The difference between syntactical rules in the narrower sense and the logical rules of deduction is only the difference between formation rules and transformation rules. 1948 H. Reichenbach Elem. Symbolic Logic i. 16 Formation rules..tell us under what conditions a set of signs is meaningful. 1965 P. Caws Philos. of Sci. xvi. 119 Formation-rules..specify how primitive or other terms may be put together to form acceptable expressions. 1966 Amer. Philos. Q. 3 7/1 Speech activities..proceed in accordance with formation rules. < as lemmas |
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