 Searle’s escape route is blocked if one can show that, for any finite list of the relevant sort (and for persons fully knowledgeable of the name’s meaning—see  Section 2.3),  it is conceivable that the true referent satisfies none of the conditions on the list. If clusters are finite lists of conditions, then the theory predicts that there is some such list for which it is a priori that the referent satisfies at least one of its conditions.