Syntax: @OR(argumentlist)
argumentlist = any combination of numbers, cells or ranges
@OR returns 1 if any argument is 1; 0 if all arguments are 0; otherwise -1 (unknown).
Examples:
A1 = 1, B1 = 1, C1 = 0, D1 = 0, E1 = 1 and A2 = 24
@OR(C1, D1) = 0
@OR(A1..E1) = 1
@OR(A1..A2) = -1