that there is something such that if it is not a kind of a nativist it is Lancastrian and is not a gladiolus is incorrect.
sent1: the banteng is Lancastrian but not a gladiolus if it is a nativist. sent2: there exists something such that if it is a nativist then it is Lancastrian thing that is not a gladiolus. sent3: there exists something such that if it is not nativist it is a kind of a Lancastrian. sent4: if the banteng is not a nativist it is Lancastrian thing that is not a kind of a gladiolus. sent5: if the banteng is not a kind of a nativist that it is a kind of a Lancastrian is not wrong. sent6: the banteng is a Lancastrian and it is a kind of a gladiolus if that it is not nativist hold. sent7: there exists something such that if it is not a kind of a nativist then that it is not a gladiolus is not wrong. sent8: there exists something such that if it is not a nativist it is a kind of Lancastrian a gladiolus.
sent4 -> hypothesis;
$hypothesis$ = that there is something such that if it is not a kind of a nativist it is Lancastrian and is not a gladiolus is incorrect. ; $context$ = sent1: the banteng is Lancastrian but not a gladiolus if it is a nativist. sent2: there exists something such that if it is a nativist then it is Lancastrian thing that is not a gladiolus. sent3: there exists something such that if it is not nativist it is a kind of a Lancastrian. sent4: if the banteng is not a nativist it is Lancastrian thing that is not a kind of a gladiolus. sent5: if the banteng is not a kind of a nativist that it is a kind of a Lancastrian is not wrong. sent6: the banteng is a Lancastrian and it is a kind of a gladiolus if that it is not nativist hold. sent7: there exists something such that if it is not a kind of a nativist then that it is not a gladiolus is not wrong. sent8: there exists something such that if it is not a nativist it is a kind of Lancastrian a gladiolus. ; $proof$ = 
sent4 -> hypothesis; __DISPROVED__