A better Example
Let’s take a look at another example, this time lets use:
In Discrete Maths, 'Functions' have 3 features:
K1 – If a is always true, then p(a) = 1.
K2 – If a AND b are never true at the same time, then the probability of a OR b being true is p(a) + p(b).
These axioms become more important when we talk about the idea of a 'dutch book'.