Yes, this is relevant for discrete distributions. Why is X<0 impossible to represent? If the support is {0, 1, …, k}, then Pr(X < 0) = 1 – Pr(X >= 0) = 1 – Pr(

Yes, this is relevant for discrete distributions. Why is X<0 impossible to represent? If the support is {0, 1, …, k}, then Pr(X < 0) = 1 – Pr(X >= 0) = 1 – Pr(–X <= 0) = 0.