"John Smith" wrote in message
...
What our watches measure is "something", it could just be some
undiscovered quality/law of matter, and that is useful--my appointment
keeping stands.

However, when you start plugging these things into mathematical "laws" and
NOT caring EXACTLY what they are about, it is insane, now it is
useful--and one is best using such 'til better comes along ... BUT, you
NEVER forget you really DON'T KNOW or DON'T UNDERSTAND what is really
happening and are only substituting "magic numbers" so as to get some type
of usable results ...

Well, that's the current state of physics, isn't it? We don't know what
electricity "really is" either, but that doesn't stop us from producing
"mathematical laws" that describe it's behavior. Electricity is "real"
even though we don't know what it "really is".

The same applies to gravity, and to spacetime.

Mike