that the basilarness occurs is not incorrect.
sent1: the surrendering does not occur. sent2: if the nonmonotonicness does not occur the fact that both the surrender and the basilarness occurs is false.
the basilarness does not occur.
$hypothesis$ = that the basilarness occurs is not incorrect. ; $context$ = sent1: the surrendering does not occur. sent2: if the nonmonotonicness does not occur the fact that both the surrender and the basilarness occurs is false. ; $proof$ = 
__UNKNOWN__