the ingratiation does not occur.
sent1: the ingratiation does not occur if that the crossbreeding ruined does not occur and the crossbreeding edema does not occur is not wrong. sent2: the crossbreeding edema does not occur. sent3: the crossbreeding ruined does not occur.
sent3 & sent2 -> int1: the crossbreeding ruined does not occur and the crossbreeding edema does not occur.; sent1 & int1 -> hypothesis;
$hypothesis$ = the ingratiation does not occur. ; $context$ = sent1: the ingratiation does not occur if that the crossbreeding ruined does not occur and the crossbreeding edema does not occur is not wrong. sent2: the crossbreeding edema does not occur. sent3: the crossbreeding ruined does not occur. ; $proof$ = 
sent3 & sent2 -> int1: the crossbreeding ruined does not occur and the crossbreeding edema does not occur.; sent1 & int1 -> hypothesis; __PROVED__