there exists something such that if it is a threaded then the fact that it is both not a draft and not valent is not correct.
sent1: if the waveguide is a kind of a threaded that it is both not a draft and not valent does not hold.
sent1 -> hypothesis;
$hypothesis$ = there exists something such that if it is a threaded then the fact that it is both not a draft and not valent is not correct. ; $context$ = sent1: if the waveguide is a kind of a threaded that it is both not a draft and not valent does not hold. ; $proof$ = 
sent1 -> hypothesis; __PROVED__