10 ms·

I think it's the intersection, so, "and". P(A|B,C) is "Probability of A, given both B and C".

• spacehome 12y ago
  That's true, may be a slightly confusing way to interpret it, given that C = A∪B. In context I think it's better to read it as P(A|B), in the case that C occurs.
  • theophrastus 12y ago
    wouldn't that be P((A|B)|C) ? or even more precedence dubious: P(A|B|C) ?
    • DrewAllyn 12y ago
      The "given" symbol should only appear once in any probability statement.
      • spacehome 12y ago
        That's true from an objective, mathematical standpoint. But the paradox is really saying something about how humans perceive the statement, so different (mathematically equivalent) ways of framing the same thing can make a difference. It's a minor point.