the ineffectiveness does not occur and the drooping does not occur.
sent1: the ineffectiveness does not occur. sent2: the drooping does not occur.
sent1 & sent2 -> hypothesis;
$hypothesis$ = the ineffectiveness does not occur and the drooping does not occur. ; $context$ = sent1: the ineffectiveness does not occur. sent2: the drooping does not occur. ; $proof$ = 
sent1 & sent2 -> hypothesis; __PROVED__