Ape in the coat comments on Should you refuse this bet in Technicolor Sleeping Beauty?

[Ape in the coat]

Well done!

Halfer and thirder are about answer to the initial question of the Sleeping Beauty problem: What is the probability that the coin landed tails when you awake in the experiment?

[Viktor Rehnberg]

I’d say $P\left(\text{Tail}|\text{Wake-up}\right)=2/3$