the quarterlight is nontoxic.
sent1: there exists something such that it is not a Azolla and it does not commutate Jowett. sent2: there is something such that it does not rival Teucrium. sent3: something is nontoxic if the fact that it is not a kind of an introvert and it is not literal does not hold. sent4: if there exists something such that it is a Welsh then that the quarterlight is not an introvert and it is not literal is not correct.
sent3 -> int1: if the fact that the quarterlight is not an introvert and not literal does not hold it is nontoxic.;
$hypothesis$ = the quarterlight is nontoxic. ; $context$ = sent1: there exists something such that it is not a Azolla and it does not commutate Jowett. sent2: there is something such that it does not rival Teucrium. sent3: something is nontoxic if the fact that it is not a kind of an introvert and it is not literal does not hold. sent4: if there exists something such that it is a Welsh then that the quarterlight is not an introvert and it is not literal is not correct. ; $proof$ = 
sent3 -> int1: if the fact that the quarterlight is not an introvert and not literal does not hold it is nontoxic.; __UNKNOWN__