 In addition, as further convenient notation, we can write \( \mathbf{P}\left(\Guilty, \Weapon\right)\) to denote the probabilities of all combinations of values of the relevant set of random variables. This is referred to as the joint probability distribution of \(\Guilty\) and \(\Weapon\). The full joint probability distribution covers the distribution for all the random variables used to describe a world. Given our simple murder world, we have 20 atomic events summed up in the equation       \[     \mathbf{P}\left(\Guilty, \Weapon, \PriceTChina\right)     \]   