▁cogn ition ▁that ▁could ▁em brace ▁these ▁elements , ▁rather ▁than ▁simply ▁explain ▁them ▁away . ▁ ▁Hans on ' s ▁post hum ous ▁works ▁include ▁What ▁I ▁Do ▁Not ▁Bel ieve ▁and ▁Other ▁Ess ays ▁( 1 9 7 1 ) ▁and ▁Const ell ations ▁and ▁Con ject ures ▁( 1 9 7 3 ). ▁He ▁is ▁also ▁known ▁for ▁the ▁ess ays ▁What ▁I ▁Do ▁Not ▁Bel ieve ▁and ▁The ▁Ag nost ic ' s ▁D ile m ma , ▁among ▁other ▁writ ings ▁on ▁belief ▁systems . ▁ ▁From ▁Michael ▁S cri ven ' s ▁pre face ▁to ▁Hans on ' s ▁post hum ous ▁Per ception ▁and ▁Disc overy : ▁ ▁In ▁a ▁general ▁sense ▁Hans on ▁continues ▁the ▁application ▁of ▁the ▁W itt gen stein ian ▁approach ▁to ▁the ▁philosophy ▁of ▁science , ▁as ▁Wa iss man ▁and ▁Toul min ▁have ▁also ▁done . ▁But ▁he ▁goes ▁much ▁further ▁than ▁they , ▁expl oring ▁questions ▁about ▁per ception ▁and ▁discovery ▁in ▁more ▁detail , ▁and ▁... ▁t ying ▁in ▁the ▁history ▁of ▁science ▁for ▁exempl ification ▁and ▁for ▁its ▁own ▁benefit . ▁Hans on ▁was ▁one ▁of ▁the ▁rare ▁think ers ▁in ▁the ▁tradition ▁of ▁Whe well ▁– ▁a ▁man ▁he ▁much ▁adm ired ▁– ▁who ▁could ▁really ▁benefit ▁from ▁and ▁yield ▁benefits ▁for ▁both ▁the ▁history ▁and ▁philosophy ▁of ▁science . ▁ ▁In flu ence ▁▁ ▁Hans on ' s ▁ 1 9 5 8 ▁work ▁Pattern s ▁of ▁Disc overy ▁was ▁followed ▁up ▁on ▁by ▁Thomas