the unostentatiousness occurs.
sent1: that the lettering mainstreamed happens hold. sent2: the polyphonicness does not occur. sent3: the illativeness happens. sent4: that both the lettering mainstreamed and the illativeness happens triggers that the unostentatiousness does not occur.
sent1 & sent3 -> int1: the lettering mainstreamed occurs and the illativeness occurs.; int1 & sent4 -> hypothesis;
$hypothesis$ = the unostentatiousness occurs. ; $context$ = sent1: that the lettering mainstreamed happens hold. sent2: the polyphonicness does not occur. sent3: the illativeness happens. sent4: that both the lettering mainstreamed and the illativeness happens triggers that the unostentatiousness does not occur. ; $proof$ = 
sent1 & sent3 -> int1: the lettering mainstreamed occurs and the illativeness occurs.; int1 & sent4 -> hypothesis; __DISPROVED__