there exists something such that if it is a tenner the fact that it is not a Thracian or it is unmusical or both does not hold.
sent1: if the pinch is a tenner then that it is not a kind of a Thracian or is unmusical or both is not correct.
sent1 -> hypothesis;
$hypothesis$ = there exists something such that if it is a tenner the fact that it is not a Thracian or it is unmusical or both does not hold. ; $context$ = sent1: if the pinch is a tenner then that it is not a kind of a Thracian or is unmusical or both is not correct. ; $proof$ = 
sent1 -> hypothesis; __PROVED__