the outstaring horsefly does not occur.
sent1: the leafiness does not occur and the upholstery does not occur if the enforceableness does not occur. sent2: if the leafiness does not occur and the upholstery does not occur the outstaring horsefly happens. sent3: the upholstery happens. sent4: if the upholstery happens and/or the leafiness happens then the outstaring horsefly does not occur.
sent3 -> int1: the upholstery and/or the leafiness happens.; sent4 & int1 -> hypothesis;
the outstaring horsefly happens.
$hypothesis$ = the outstaring horsefly does not occur. ; $context$ = sent1: the leafiness does not occur and the upholstery does not occur if the enforceableness does not occur. sent2: if the leafiness does not occur and the upholstery does not occur the outstaring horsefly happens. sent3: the upholstery happens. sent4: if the upholstery happens and/or the leafiness happens then the outstaring horsefly does not occur. ; $proof$ = 
sent3 -> int1: the upholstery and/or the leafiness happens.; sent4 & int1 -> hypothesis; __PROVED__