Questionable Premise

If you have sufficient background information to know that a premise is questionable or unlikely to be acceptable, then you commit this fallacy if you accept an argument based on that premise. This broad category of fallacies of argumentation includes appeal to authority, false dilemma, inconsistency, lying, stacking the deck, straw man, suppressed evidence, and many others.

No Middle Ground

See False Dilemma.

False Dilemma

A reasoner who unfairly presents too few choices and then implies that a choice must be made among this short menu of choices commits the false dilemma fallacy, as does the person who accepts this faulty reasoning.

Example:

I want to go to Scotland from London. I overheard McTaggart say there are two roads to Scotland from London: the high road and the low road. I expect the high road is dangerous because it's through the hills. But it's raining, so both roads are probably slippery. I don't like either choice, but I guess I should take the low road.

This would be fine reasoning is you were limited to only two roads, but you've falsely gotten yourself into a dilemma with such reasoning. There are many other ways to get to Scotland. Don't limit yourself to these two choices. You can take other roads, or go by boat or train or airplane. Think of the unpleasant choice as a charging bull. By demanding other choices beyond those on the unfairly limited menu, you thereby "go between the horns" of the dilemma, and are not gored. For another example of the fallacy, see Black-or-White.

False Dichotomy

See False Dilemma or Black-or-White.

Excluded Middle

See False Dilemma or Black-or-White.

Black-or-White

The black-or-white fallacy is a false dilemma fallacy that unfairly limits you to only two choices.

Example:

Well, it's time for a decision. Will you contribute $10 to our environmental fund, or are you on the side of environmental destruction?

A proper challenge to this fallacy could be to say, "I do want to prevent the destruction of our environment, but I don't want to give $10 to your fund. You are placing me between a rock and a hard place." The key to diagnosing the black-or-white fallacy is to determine whether the limited menu is fair or unfair. Simply saying, "Will you contribute $10 or won't you?" is not unfair.