15. As to the incompatibility or repugnancy to co-existence, we may know that any subject may have of each sort of primary qualities but one particular at once:
15. Koexistitzeko bateraezintasun edo aurkakotzari dagokionez, badakigu edozein subjektuk lehen koalitate mota bakoitzetik aldi berean koalitate bat baino ezin duela eduki;