that there exists something such that if it is both not a jaconet and not a speck then it is not toeless does not hold.
sent1: there exists something such that if it is not a kind of a sheepman and does not engineer it does not thread. sent2: there exists something such that if it is not a sheepshead and is not non-quotable it does not brief everlastingness. sent3: the stamen is not toeless if it is not a jaconet and does not speck. sent4: there exists something such that if it does not slump and is a mercer it is not bentonitic.
sent3 -> hypothesis;
$hypothesis$ = that there exists something such that if it is both not a jaconet and not a speck then it is not toeless does not hold. ; $context$ = sent1: there exists something such that if it is not a kind of a sheepman and does not engineer it does not thread. sent2: there exists something such that if it is not a sheepshead and is not non-quotable it does not brief everlastingness. sent3: the stamen is not toeless if it is not a jaconet and does not speck. sent4: there exists something such that if it does not slump and is a mercer it is not bentonitic. ; $proof$ = 
sent3 -> hypothesis; __DISPROVED__