Dear Andrzej, > The question is, > what the probability is that: > a) John know 0% password, > b) Robert know 50% password, > c) Michael know 100% password? > > In other words, > how to calculate the numbers 0%, 50%, 100% by using probability theory?
Since we've already been told that these numbers hold, the probabilities are 100% - there is no uncertainty involved (and no need for calculations since we've been told the answers). If there is no uncertainty, there is no need for probability theory (and also it becomes off-topic for this list). However, most of the examples you gave earlier _do_ contain uncertainty, so that probability theory _is_ an appropriate tool for talking about them. You have been arguing that they are not random, but the Bayesian interpretation of probability theory, along with several other interpretations, view the theory as describing uncertainty, not randomness. Konrad
