And so theoretically you say, well look, if I want to figure out the probability of getting a heads, in theory I have two equally likely possibilities and heads is one of those two equally likely possibilities. So you have a 1 1⁄2 probability. And once again, if in theory the coin is definitely fair, it's a fair coin and it's flipped in a very fair way, then this is true. You have a 1 1⁄2 probability. We could also do that with rolling a die. A fair six-sided die is going to have six possible outcomes. One, two, three, four, five, and six.