 Relevant to determining whether the antecedent of Sosa’s conditional is satisfied are the methodological concerns about survey methods noted above and their ability to support claims of intuition disagreement. Relevant to determining the possibility of the antecedent of Sosa’s conditional being satisfied are the distinctively a priori concerns raised above  (§3.4.2)  about the possible extent of disagreement, about how the existence of widespread disagreement could be justifiably believed to exist  (§3.3.2),  and, importantly, about the non-self-undermining constraint.