Frege thought sentence has direct and indirect reference in complicated context, Substituteing salva veritate not losing its effects.
弗雷格认为在复杂语境中，句子具有通常意谓和间接意谓，“保值替换”并不失效。
Frege thought sentence has direct and indirect reference in complicated context, Substituteing salva veritate not losing its effects.
弗雷格认为在复杂语境中，句子具有通常意谓和间接意谓，“保值替换”并不失效。
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