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A probability is a finitely additive measure on a boolean algebra with total measure $1$. A function $P:\scr B \times (\scr B - \{ 0 \})$ is a full conditional probability on $\scr B$ (for a boolean ...

Obviously the question in the title alone doesn't make sense so I'll develop on the context and then I'll ask my question : Studying $AD$ (axiom of determinacy) I had to prove that $AD$ and $AC$ are ...