  The alternative is to take concrete token sentences (utterances or written inscriptions) as the objects that play the roles normally associated with propositions. One problem here is that only a finite number of sentences ever get uttered. And so some find it difficult to make sense of general logical laws, e.g. the law that any two falsehoods form a false disjunction, since the disjunction may not get uttered or written (Quine 1969, 143). (One possible solution might be to reformulate the law so as to say that if the disjunction of P and Q exists, it is false if and only if P and Q are false.)