Ultimately, it comes down to semantics. Does a vacuum suck or does external pressure push in on the vacuum? My highschool chem teacher said, "there is no suck

Ultimately, it comes down to semantics. Does a vacuum suck or does external pressure push in on the vacuum? My highschool chem teacher said, "there is no suck," but, depending on your perspective, either explanation is valid. Reality is subjective and language is imperfect.