nightbat wrote

It does to a certain extant physically and theoretically
it holds even into the quantum but there observational confirmation is
limited or non existent. That's the problem and the major stumbling
block to field unification. For Dr. Einstein held out that a physical
based field theory should be sought out and not left to quantum
uncertainty of how the universe primly base works. Man made coordinate
systems are fine without knowing from where or what is the base essence
of what the space as deduced field is composed of, but not totally
satisfactory. Anomalies keep space cropping up and scientists have to
keep adjusting for these unexpected events. It's like a blind man that
has memorized his physical surroundings to a point he feels very
comfortable until that one new or unexpected event pops up and he's lost
and fumbling.

See:
http://u.no.net/1p

All advanced field theoretical scientists and researchers have is
working applied theories to help guide them and quantum invisible based
good and shaky ones. Like Officer Oc states by the abundant physical
predictable gravitational effects do researchers guide themselves always
hoping their vision into the invisible improves while taking advantage
of those applied residual effects. X-Ray and infrared observation
technology tools have greatly aided in the search for inner universe
workings understandings, but still the bigger picture is in the hands
and minds of the deeper thinking theoretical deducing model makers and
scientific researchers.

ponder on,
the nightbat