Re: E = 3/4 mc? or E = mc?? The forgotten Hassenohrl 1905 work.

On Fri, 6 Dec 2024 20:00:10 +0000, J. J. Lodder wrote:

Finaly, you really need to get yourself out of the conceptual knot
that you have tied yourself in.
Something is either defined, or it can be measured.
It can't possibly be both,

Sure it can, provided that you use a different measurement standard
than the one used in the definition.
It would not make sense to quantify hypothetical variations in the
speed of light in terms of the post-1983 meter. But they would make
sense in terms pre-1983 meters. Or (assuming some incredible ramp-up
in technology, perhaps introduced by Larry Niven-ish Outsiders) in
terms of a meter defined as the distance massless gluons travel in
1/299,792,458 of a second. Or gravitons... :-)