 \(C_1 (A,B)\), which also takes on values between 0 and 1, measures how much of the total probability mass assigned to either \(A\) or \(B\) falls into their intersection. The degree of coherence is 0 if and only if \(P(A\wedge B) = 0\), i.e., just in case \(A\) and \(B\) do not overlap at all, and it is 1 if and only if \(P(A\wedge B) = P(A\vee B)\), i.e., just in case \(A\) and \(B\) coincide. The measure is straightforwardly generalizable: