Why the ‘Sleeping Beauty Problem’ Is Keeping Mathematicians Awake

This seems to share the same irritating factor with a number of similar problems where the author muddies the waters with disinformation and nudges the goalposts and then acts as if there has been some grand unveiling. The subjective probability as perceived by a hypothetical amnesiac Sleeping Beauty as expressed through sampled data over time is not interesting or meaningful information.

What matters is what the coin did in an objective reference frame, and fundamentally that's it. We can cloud the field by introducing lots of distractions but at the end of the day a coin was flipped exactly once.