Gullibility is a failure of social intelligence in which a person is easily tricked or manipulated into an ill-advised course of action. It is closely related to credulity, which is the tendency to believe unlikely propositions that are unsupported by evidence.

Classes of people especially vulnerable to exploitation due to gullibility include children, the elderly, and the developmentally disabled.

The words gullible and credulous are commonly used as synonyms. Goepp & Kay (1984) state that while both words mean "unduly trusting or confiding", gullibility stresses being duped or made a fool of, suggesting a lack of intelligence, whereas credulity stresses uncritically forming beliefs, suggesting a lack of skepticism.Jewell (2006) states the difference is a matter of degree: the gullible are "the easiest to deceive", while the credulous are "a little too quick to believe something, but they usually aren't stupid enough to act on it."

Yamagishi, Kikuchi & Kosugi (1999) characterize a gullible person as one who is both credulous and naïve.Greenspan (2009) stresses the distinction that gullibility involves an action in addition to a belief, and there is a cause-effect relationship between the two states: "gullible outcomes typically come about through the exploitation of a victim's credulity.

The Chaser are an Australian satirical comedian group, known for their television programmes on the Australian Broadcasting Corporation channel. The group take their name from their production of satirical newspaper, a publication known to challenge conventions of taste. The group's motto is "Striving for Mediocrity in a World of Excellence".

The Chaser's earliest foundations were Charles Firth, Dominic Knight, and Chas Licciardello who went to Sydney Grammar School together and produced a small satirical school magazine entitled The Tiger. Later on, Firth and Knight met Craig Reucassel and Julian Morrow at the University of Sydney. Firth, Knight, Reucassel, Morrow, Licciardello, and later Chaser members Chris Taylor and Andrew Hansen all went to the University of Sydney. Firth, Knight, Reucassel and Morrow began writing for the University of Sydney student newspaper entitled Honi Soit. In 1999 the four members began The Chaser and their first newspaper project entitled The Chaser. The Chaser members are:

Richard Vincent "Rick" Mercer (born October 17, 1969) is a Canadian comedian, television personality, political satirist, and blogger.

Mercer first came to national attention in 1990, when he premiered his one man show Show Me the Button, I'll Push It, or Charles Lynch Must Die at the Great Canadian Theatre Company in Ottawa. A pointed, satirical political commentary on Canadian life after Meech Lake, Show Me the Button made Mercer a national star as he toured the show across Canada.^{[citation needed]} Mercer came to greater attention for his role in the satirical news show This Hour Has 22 Minutes, and his spinoff special Talking To Americans was the highest-rated comedy special in the history of CBC Television, with 2.7 million viewers.

In 1992, he created and performed his second show, I've Killed Before, I'll Kill Again, which was also a popular touring show. Also in that year, he began to work with former CODCO members Cathy Jones, Mary Walsh, and with fellow Newfoundlander Greg Thomey, to create a new television series for CBC Television which became This Hour Has 22 Minutes.