On 4/25/2019 9:30 AM, Quentin Anciaux wrote:
Can you derive today a dark-matter theory from The
Standard Model + General Relativity?
No, so what ? I just said theories change to explain new datas
or they propose test that gives rise to new results. If you
invoke invisible horses and those horses do not explain better
than competing existing theories without those invisible
entities, that theory seems useless, no better than god did it.
Quentin
What is this theory? Is it written down in arXiv somewhere?
- pt
Sometimes theories do more than merely "change". There may be a
radically new theory that is proposed.
Did I say otherwise ? where ?
Quantum Mechanics and General Relativity are more than a "change"
of the old theories.
BTW, There could be invisible horses involved ...
Yes there could be ... but not if they explain *nothing more* and no
better than existing competing theories which do not involves those
invisible horses...
Occam's razor.
The trouble with invisible horses is that they can explain anything.??
Explanation is cheap.?? Prediction is dear.
Brent
The sciences do not try to explain, they hardly even try to interpret,
they mainly make models. By a model is meant a mathematical construct
which, with the addition of certain verbal interpretations, describes
observed phenomena. The justification of such a mathematical construct
is solely and precisely that it is expected to work.
?????? --???John von Neumann
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