not the adoptiveness but the Austronesian happens.
sent1: the contracting and the bizonalness occurs. sent2: the knocking occurs. sent3: that the unobjectionableness occurs is not incorrect. sent4: the adoptiveness does not occur. sent5: both the elementariness and the Austronesianness occurs. sent6: both the expropriation and the cosmologicness occurs. sent7: the noxiousness happens. sent8: that the medium occurs is not wrong. sent9: the nonobservance occurs. sent10: both the non-dipterousness and the moment occurs. sent11: the creating occurs and the dissidence happens. sent12: the incorporealness occurs and the oscillation happens. sent13: the beguilement does not occur. sent14: not the disunifying coloration but the recital occurs. sent15: the retractileness happens and the browsing pothead happens.
sent5 -> int1: the Austronesianness happens.; int1 & sent4 -> hypothesis;
$hypothesis$ = not the adoptiveness but the Austronesian happens. ; $context$ = sent1: the contracting and the bizonalness occurs. sent2: the knocking occurs. sent3: that the unobjectionableness occurs is not incorrect. sent4: the adoptiveness does not occur. sent5: both the elementariness and the Austronesianness occurs. sent6: both the expropriation and the cosmologicness occurs. sent7: the noxiousness happens. sent8: that the medium occurs is not wrong. sent9: the nonobservance occurs. sent10: both the non-dipterousness and the moment occurs. sent11: the creating occurs and the dissidence happens. sent12: the incorporealness occurs and the oscillation happens. sent13: the beguilement does not occur. sent14: not the disunifying coloration but the recital occurs. sent15: the retractileness happens and the browsing pothead happens. ; $proof$ = 
sent5 -> int1: the Austronesianness happens.; int1 & sent4 -> hypothesis; __PROVED__