there is something such that if it is a Tswana then the fact that it does not stab nightmare hold.
sent1: the phoebe does not stab nightmare if it is a Tswana. sent2: there is something such that if it is a Tswana it does stab nightmare.
sent1 -> hypothesis;
$hypothesis$ = there is something such that if it is a Tswana then the fact that it does not stab nightmare hold. ; $context$ = sent1: the phoebe does not stab nightmare if it is a Tswana. sent2: there is something such that if it is a Tswana it does stab nightmare. ; $proof$ = 
sent1 -> hypothesis; __PROVED__