A riddle joke, joke riddle, pseudo-joke or conundrum is a riddle that does not expect the asked person to know the answer, but rather constitutes a set-up to the humorous punch line of the joke.
It is one of the four major types of riddles, according to Nigel F. Barley. There are many cycles of jokes in the form of a conundrum, such as elephant jokes, "Why did the chicken cross the road?" and lightbulb jokes.
A joke is a display of humour in which words are used within a specific and well-defined narrative structure to make people laugh and is usually not meant to be interpreted literally. It usually takes the form of a story, often with dialogue, and ends in a punch line, whereby the humorous element of the story is revealed; this can be done using a pun or other type of word play, irony or sarcasm, logical incompatibility, hyperbole, or other means. Linguist Robert Hetzron offers the definition:
It is generally held that jokes benefit from brevity, containing no more detail than is needed to set the scene for the punchline at the end. In the case of riddle jokes or one-liners, the setting is implicitly understood, leaving only the dialogue and punchline to be verbalised. However, subverting these and other common guidelines can also be a source of humour—the shaggy dog story is an example of an anti-joke; although presented as a joke, it contains a long drawn-out narrative of time, place and character, rambles through many pointless inclusions and finally fails to deliver a punchline. Jokes are a form of humour, but not all humour is in the form of a joke. Some humorous forms which are not verbal jokes are: involuntary humour, situational humour, practical jokes, slapstick and anecdotes.
"Why did the chicken cross the road?" is a common riddle joke with the answer being "To get to the other side." It is commonly seen as an example of anti-humor, in that the curious setup of the joke leads the listener to expect a traditional punchline, but they are instead given a simple statement of fact. The joke has become iconic as an exemplary generic joke to which most people know the answer, and has been repeated and changed numerous times over the course of history.