Frege' s theory of meaning consists of two parts:the theory of sense and the theory of denotation.Frege holds that it is plausible to connect with a sign not only the designated object,but also the sense of the sign in which is contained the manner and context of presentation.Only through 'sense vehicle' can a sign establish its relation to the object,and it is a one-way relation:sense determines denotation.Considering the sentence in the same way,Frege draws the following conclusion:the sense of a sentence is the thought expressed by it,and the denotation of a sentence is its truth-value.Base...