[英]What is the difference between Well-formed formula and a preposition in propositional logic
格式正确的公式与命题逻辑中的命题之间的确切区别是什么?
在我的书中,关于Wff的内容确实很少。
我的书说:“命题也被称为句子或陈述。另一个术语公式或格式正确的公式也指相同的术语。也就是说,我们也可以称谓格式良好的公式来引用一个命题。” 这是否意味着它们都是完全相同的东西?
命题:对或错的陈述,易于阅读,但很难用逻辑上的对等物来操纵
WFF:正确或错误的逻辑陈述,您的教科书中应有一个正式的严格定义。 他们必须遵循4条规则。 人类较难阅读,但更加精确且易于操纵
例:
All men are mortal
for all x in PM(x) -> S(x)
书中很可能有错字。 在报价单中, Propositions are also called sentences or statements. Another term formulae or well-formed formulae also refer to the same. That is, we may also call Well formed formula to refer to a preposition
Propositions are also called sentences or statements. Another term formulae or well-formed formulae also refer to the same. That is, we may also call Well formed formula to refer to a preposition
Propositions are also called sentences or statements. Another term formulae or well-formed formulae also refer to the same. That is, we may also call Well formed formula to refer to a preposition
,“介词”一词应为“介词”。
命题 :-是对还是错,但不是同时存在的陈述。
命题形式 (理解良好形式的公式所必需):-包含至少一个命题变量的断言。
格式正确的公式 :-满足以下规则的命题形式,并且可以使用以下规则导出任何Wff(格式正确的公式):-
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