On 27.12.2020 14:59, Pentcho Valev wrote:
"The concepts of time (spacetime) in quantum theory and GR are thus drastically different and CANNOT BOTH BE FUNDAMENTALLY TRUE."http://hindawi.com/journals/isrn/2013/509316/


Whatever the wording 'fundamentally true' means. The simple quantum
mechanic ignores relativistic effects and can be applied to many cases
with high degree of accuracy. The relativistic quantum mechanic includes
such effects to some degree. The GR does not include quantum effects and
describes other scenario of the nature. In some cases gravitation can be
neglected, in other cases quantum effects can be neglected. Afaik, there
is not such one theory for all yet. A theory must also be applicable or
computable. Therefore it makes sense to apply the simplest theory that
gives the wanted accuracy.