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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But despite some lapses into trendy jargon, Caritas in Veritate (Charity in Truth), a 144-page encyclical issued by Pope Benedict XVI on July 7th, is certainly not a banal or trivial document.