The term suspension of disbelief or willing suspension of disbelief has been defined as a willingness to suspend one's critical faculties and believe the unbelievable; sacrifice of realism and logic for the sake of enjoyment. The term was coined in 1817 by the poet and aesthetic philosopher Samuel Taylor Coleridge, who suggested that if a writer could infuse a "human interest and a semblance of truth" into a fantastic tale, the reader would suspend judgement concerning the implausibility of the narrative. Suspension of disbelief often applies to fictional works of the action, comedy, fantasy, and horror genres. Cognitive estrangement in fiction involves using a person's ignorance to promote suspension of disbelief.
The phrase "suspension of disbelief" came to be used more loosely in the later 20th century, often used to imply that the burden was on the reader, rather than the writer, to achieve it. This might be used to refer to the willingness of the audience to overlook the limitations of a medium, so that these do not interfere with the acceptance of those premises. These fictional premises may also lend to the engagement of the mind and perhaps proposition of thoughts, ideas, art and theories.
Suspension of disbelief is often an essential element for a magic act or a circus sideshow act. For example, an audience is not expected to actually believe that a woman is cut in half or transforms into a gorilla in order to enjoy the performance.
According to the theory, suspension of disbelief is an essential ingredient for any kind of storytelling. With any film, the viewer has to ignore the reality that they are viewing a two-dimensional moving image on a screen and temporarily accept it as reality in order to be entertained. Black-and-white films provide an obvious early example that audiences are willing to suspend disbelief, no matter how unreal the images appear, for the sake of entertainment. With the exception of totally color blind people (See: Achromatopsia), no person viewing these films sees the real world without color, but they are still willing to suspend disbelief and accept the images in order to be entertained. Suspension of disbelief is also supposed to be essential for the enjoyment of many movies and TV shows involving complex stunts, special effects, and seemingly unrealistic plots, characterizations, etc.
Coleridge coined the phrase in his Biographia Literaria, published in 1817, in the context of the creation and reading of poetry. Chapter XIV describes the preparations with Wordsworth for their revolutionary collaboration Lyrical Ballads (first edition 1798), for which Coleridge had contributed the more romantic, gothic pieces including The Rime of the Ancient Mariner. Poetry and fiction involving the supernatural had gone out of fashion to a large extent in the 18th century, in part due to the declining belief in witches and other supernatural agents among the educated classes, who embraced the rational approach to the world offered by the new science. Alexander Pope, notably, felt the need to explain and justify his use of elemental spirits in The Rape of the Lock, one of the few English poems of the century that invoked the supernatural. Coleridge wished to revive the use of fantastic elements in poetry. The concept of "willing suspension of disbelief" explained how a modern, enlightened audience might continue to enjoy such types of story.