This fallacy relies on applying a binary level reasonning on a non-binary level which leaves only the choice between the two extremes. It is close to the false dilemna fallacy.Some minds tend to consider only extremes (love/hate, good/evil, etc.) and forget about the possible middle positions which leads to numerous logical fallacies, this is known as Manicheism.The opposite of this fallacy is the middleground fallacy.