Especially when reasoning about problems and solutions, writers must weigh options. To be fair, a writer should mention the full range of options, showing why one is superior to the others or might work well in combination with others.
It is unfair to suggest that only two alternatives exist when in fact there are more. Writers who set up a false choice between their preferred option and one that is clearly unsatisfactory are guilty of the either . . . or fallacy.
EITHER . . . OR FALLACY
Our current war against drugs has not worked. Either we should legalize drugs or we should turn the drug war over to our armed forces and let them fight it.
Are these the only solutions—legalizing drugs and calling out the military? Other options, such as increased funding for drug abuse prevention programs, are possible.