A dilemma is a problem offering two solutions, neither of which is acceptable. The two options are often described as the horns of a dilemma, neither of which is comfortable.

The dilemma is sometimes used as a rhetorical device, in the form 'you must accept either A, or B'; here A and B would be propositions each leading to some further conclusion. Applied in this way, it may be a fallacy.

See also

• Euthyphro dilemma
• False dilemma
• Plutonia dilemma
• Prisoner's dilemma
• Security dilemma