If undesirable states of affairs are logically necessary for outweighing goods, then the mere existence of evil is not incompatible with the existence of an omnipotent, omniscient, and morally perfect being.
(as used to describe conflicting demands or responsibilities)
Unable to exist or work together at the same time; conflicting with each other.
logically necessary(Distinguished from metaphysical necessity in Swinburne's argument)
That which could not fail to exist or be true; its non-existence or falsehood would be a logical contradiction
omnipotent(Used in the context of arguing about whether multiple omnipotent beings could coexist.)
A being whose will is never thwarted; a being capable of bringing about any willed outcome.
the problem of evil(Contemporary philosophical terminology)
The family of issues raised by the question of why pain, moral wickedness, and varieties of imperfection exist if a perfectly good and all-powerful God alone created everything in the universe.
The upshot is that the idea that either the actuality of certain undesirable states of affairs, or at least the possibility, may be logically necessary for goods that outweigh them, is not without some initial plausibility, and if some such claim can be sustained, it will follow immediately that the mere existence of evil cannot be incompatible with the existence of an omnipotent, omniscient, and morally perfect being.