"Physical reality" tends to imply what appear to be persistent or repetitive states of affairs which involve the five senses directly, or indirectly via transducers (such as radio wave detectors). Pragmatically, we tend to think of such states as observer independent, but the categorization
of "statehood" ( such as "the color green", or "the hardness of rock") is obviously dependent on a hypothetical
standard observer whether present or not. Such observer dependent states should not be confused with the realists' word "properties" which implies that there exist "objects " possessing them. Those who actually contemplate the issue might conclude, as others already have, that "properties" amount to statements of our expectations
about our interactive relationships with aspects of "our world".
It is the abstract persistence of words
like "rock", which tends pragmatically to be interpreted as the concrete persistence of "a thing". But in essence, all is in flux
including us, and the molecules of "the rock". What actually
persists is our confidence in "the rock" as part of a state of affairs in which "a rock" can be potentially utilized (as a hammer, a weight, a missile etc). (Reference: Heidegger Zuhandenheit
" Ready to Hand"). Thus "being" always implies the process of dynamic inter-activeness NOT static "is-ness".