Since Groovy 1.8.3 we can use the implies() method on Boolean types. The implies() method implements a logical implication. This means that if we have two Boolean variables A and B, that if A is true, then B is true. So if A is true then it is implied B is true as well. If A is false then B can be either true or false. We could rewrite the implication as !A or B.
def a = true def b = true assert a.implies(b) assert !(a.implies(false)) assert a.implies(b) == ((!a).or(b)) assert true.implies(true) assert false.implies(true) assert false.implies(false) assert !true.implies(false)
(Code written with Groovy 2.0.4)