  The account offered was intended as an analysis of knowledge, but revealingly Ayer did not require that believers be aware of how they have the right to be sure. It was allowed that somebody who invariably correctly predicted the outcome of a lottery could be said to know that their prediction was true, even though they, nor anyone else, had any idea of how the predictions came to be reliable. Ayer admitted that this case, and others like it, may cause some dispute: it was not clearly covered by the meaning of the term ‘knowledge’, and so left room for some stipulation.