there exists something such that if it is not a Handy it is a kind of a spot-welder.
sent1: there exists something such that if it is a kind of a Handy then it is a spot-welder.
$hypothesis$ = there exists something such that if it is not a Handy it is a kind of a spot-welder. ; $context$ = sent1: there exists something such that if it is a kind of a Handy then it is a spot-welder. ; $proof$ = 
__UNKNOWN__