I mean that the relationship between Newtonian mechanics and Quantum mechanics is such that the matter described by Newtonian mechanics is composed of matter whose precise behavior is exclusively described by quantum mechanics, that is that underlying matter is fundamental to the macro behavior.
I'm by no means a physicist, but a formal treatment of this kind of relationship (and predicted consequences) is captured in Constructor Theory (as David Deutsch who may have been early in identifying this was able to formalize this in the much more precise language of physics)
Intuitively, if you took a whiffle ball (or pair of whiffle balls, or some other ensembleoof whiffle balls sufficient to represent a system's state) in your hands, and a little obstacle course representing, say, beam splitters, and with each in your hands somehow made these classical implements behave like photons, you would have little hope of doing this at light speed.