that there is something such that if it is not a oarsmanship that it thwarts is not incorrect is incorrect.
sent1: the airfield thwarts if it is not a oarsmanship.
sent1 -> hypothesis;
$hypothesis$ = that there is something such that if it is not a oarsmanship that it thwarts is not incorrect is incorrect. ; $context$ = sent1: the airfield thwarts if it is not a oarsmanship. ; $proof$ = 
sent1 -> hypothesis; __DISPROVED__