 Of course, he concedes, the logical behaviour of the terms of non-notational discourse may be assisted by studies in formal logic; so may chess-playing assist generals. But waging a campaign can no more be replaced by playing games of chess than the study of the logical behaviour of the terms of non-notational discourse can be replaced by doing formal logic. Thus in the slogan ‘Back to ordinary language’, ‘ordinary’ may be contrasted with ‘notional’. The slogan can then be used by those who have awoken from the formaliser’s dream. So used, he says, it should be repudiated only by those who hope to replace philosophising by reckoning (1953, 316–7).