 If there is no swimming pool locally, it is “natural enough”, according to Strawson, to say that (45a) is false, and since the king of France doesn’t exist, the same applies to (45b). And if these sentences are false, their negations must be true. So, if these subtle judgments are accepted, there are cases in which presupposition failure does not prevent us from saying that a sentence is true or false. But Strawson hasn’t changed his mind about Russell’s example: