Читать книгу The Philosopher's Toolkit - Julian Baggini, Julian Baggini - Страница 88

As it turns out, all valid arguments can be restated as tautologies – that is, hypothetical statements in which the antecedent is the conjunction of the premises and the consequent the conclusion. In other words, every valid argument may be articulated as a statement of this form: ‘If w, x, and y are true, then c is true’, where w, x, and y are the argument’s premises and c is its conclusion. When any valid argument is substituted into this form, a tautology results.