General form:

exp = (p1 or p3) and (~p2 or p3 or p4) and (p3 or ~p4 or ~p1)

individual = (p1, p2, p3, p4) = (0, 0, 1, 0)   =>   exp = true

Evaluation:

val(A1 and A2 and ... An ) = mean(val(A1), val(A2), ... val(An))

val(A1 or A2 or ... An ) = max(val(A1), val(A2), ... val(An))