287 karma · joined August 29, 2016
How do you figure? As a contradiction, take your atom+electromagnetic field system, describe the transition from excited atom to unexcited atom + photon state, and project out the E&M field. Voila, now you have a quantum description of an atom transitioning between different energy states. Its dynamics may look funny, i.e. they may appear nonlocal, they may not conserve energy, etc. but that's different from saying "there is not a quantum description of these dynamics" which is what you're claiming.
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This is incorrect. I suspect you're overextending proto3's treatment of unknown fields to include discarding incorrectly typed fields too. If A has field 1 types as an int, and B has field 1 typed as a string, an A message with field 1 set will not parse as a B message. However, if the A message has no fields set, or sets a field number unknown to B, that could parse successfully with "leftover" unknown fields.