Schrödinger's cat and Wigner's friend

Textbooks and printed lectures have still failed to give a clear solution to the Schrödinger cat problem [E. Schrödinger, Naturwissenschaften 23, 807 (1935)]. The solution is actually quite simple. Each observer has a different wave function. When Wigner’s friend [E. P. Wigner, in The Scientist Speculates, edited by I. J. Good (Heinemann, London, 1961)] observes the cat, his friend’s wave function collapses. When Wigner‘s friend tells me what he saw, my wave function collapses to probability 1 or 0 for the aliveness of the cat. It is a matter of Bayesian probability. Probability depends on information. The same is true for probability amplitudes. Each observer may have different information and thus different probability amplitudes. The collapse of the wave function is not a mysterious event; in fact, it is not an event at all. It is merely another way of saying that an observation has occurred. If you estimate the probability that your opponent in a poker game has the ace of diamonds, the probability changes drastically or “collapses” if you peek at his hand.