False Dilemma

81 False Dilemma

Also known as: false dichotomy, the either‑or fallacy, either‑or reasoning, fallacy of false choice, fallacy of false alternatives, black‑and‑white thinking, the fallacy of exhaustive hypotheses, bifurcation, no middle ground, polarization.

A false dilemma tends to “reduce a complicated issue to excessively simple terms” or, when intentionally created, tends to “obscure legitimate alternatives” (Lunsford, Ruskiewicz, and Walters, 2015, 74). President Bush’s statement—“Every nation, in every region, now has a decision to make. Either you are with us, or you are with the terrorists.”—illustrates the fallacy by metaphorically drawing a line in the sand and implying that any lack of support would be perceived as an endorsement of terrorist activity. In reality, how nations respond involves more complexity, and certainly neutrality is a third option, but the statement reduces their options to only two.

A false dilemma occurs when only a limited set of choices—often two, sometimes three (a false trilemma), or more—are presented as the only possibilities, when in fact a broader spectrum of options exists. The wording may be “either this or that”, but the error is the unsupported claim that the listed alternatives exhaust the possibilities. Terminology varies; the relevant question is whether a viable alternative has been excluded. The logical form for two choices is:

Either X or Y is true.

For a false trilemma or larger set:

Either X, Y, or Z is true. (Or more.)

For example, then‑Governor Arnold Schwarzenegger said in 2005, “If we here in this chamber do not work together to reform the government, the people will rise up and reform it themselves. And, you know something, I will join them. And I will fight with them.” The passage presents this as a false dilemma (Broder 2005). That criticism depends on reading the alternatives as exhaustive. The reference to people rising up need not mean civil unrest; it could describe political action.

Liam Dempsey (2013) noted that shows such as The Daily Show and The Colbert Report often employed false dilemmas to highlight the “theatrics” found in political events. As Stephen Colbert used to ask many of his guests: “George W. Bush: great president or the greatest president?” This demonstrates nicely why false dilemmas are fallacies. When his guests would refuse to answer, he’d just say “I’ll put you down for great.” Clearly, his guests didn’t agree; a whole range of assessments was possible, but he forced them into two absurdly narrowed choices.

Other common examples:

• “You are either with God, or against him.” (In reality, a person may not believe there is a God to be for or against, or may hold nuanced theological views that fall between those poles.)
• “I thought you were a good person, but you weren’t at church today.” (The implied premise is that a good person would always attend. Absence alone does not establish bad character.)
• A classic false trilemma is C.S. Lewis’s argument about Jesus: “Jesus was either Lord, lunatic, or liar.” This omits other possibilities such as that the biblical accounts are legendary, that Jesus was a prophet (as in Islam), or even that Jesus never existed.
• An argument may assume that heaven and hell exhaust the possible outcomes after death without addressing alternatives.
• A coach may insist that every competition has only winners and losers even where a draw or a shared result is possible.
• People may compartmentalize everyone who is not their friend as an enemy.
• A menu claiming “We have meals for all diets: vegetarian, vegan, and meat eaters” may overlook religious dietary rules, gluten restrictions or other requirements. The issue is the unsupported claim to cover every diet, rather than simply offering a limited menu.
• A chart may falsely claim that “small, medium, or large” covers every body size. A shop offering only those sizes is not, by that fact alone, making a fallacious argument.
• “College students are either working toward an Associate’s Degree, a Bachelor’s Degree, or a Master’s Degree” overlooks doctoral degrees, certificates, and non‑degree paths.
• “Do you believe in Creationism, Evolutionary Theory, or Intelligent Design?” can create a false dilemma if the labels are treated as mutually exclusive and exhaustive. Some respondents may combine views or reject the categories.

These examples require context. A short list becomes a false dilemma when an argument treats it as exhaustive without justification.

An advertisement may compare its brand with a weaker competitor. That becomes a false dilemma if it implies that these are the buyer’s only options. A comparison between two products, on its own, does not make that claim.

Exceptions: Not every presentation of limited options is fallacious.

• If there really are only two options, presenting only those two is not a false dilemma. “You can have soup or salad with your entrée.”
• More subtly, it is not a fallacy if you are offering a limited set of possibilities without implying those are the only possibilities that exist. For example:

Mom: Billy, it’s time for bed. Billy: Can I stay up and watch a movie? Mom: You can either go to bed or stay up for another 30 minutes and read. Billy: That is a false dilemma! Mom: No, it’s not. I’m giving you two acceptable options, not claiming those are the only things you could possibly do.

The mom is not obscuring other alternatives; she is simply stating what she will permit.

Practical tip: Ask what makes the list exhaustive. Identify a feasible omitted alternative, then check whether the speaker is making a claim about all possibilities or setting the limits of a particular offer.