Suspension of Disbelief

From Wikipedia:
Suspension of disbelief or "willing suspension of disbelief" is a formula for justifying the use of fantastic or non-realistic elements in literature. It was put forth in English 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.

The phrase "suspension of disbelief" came to be used more loosely in the later 20th century, often used to imply that the onus was on the reader, rather than the writer, to achieve it. It 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.[1]

Coleridge's original formulation
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 eighteenth 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.

Coleridge recalled:
”... It was agreed, that my endeavors should be directed to persons and characters supernatural, or at least romantic, yet so as to transfer from our inward nature a human interest and a semblance of truth sufficient to procure for these shadows of imagination that willing suspension of disbelief for the moment, which constitutes poetic faith. Mr. Wordsworth on the other hand was to propose to himself as his object, to give the charm of novelty to things of every day, and to excite a feeling analogous to the supernatural, by awakening the mind's attention from the lethargy of custom, and directing it to the loveliness and the wonders of the world before us ...”
The notion of such an action by an audience was however recognized in antiquity, as seen particularly in the Roman theoretical concerns of Horace, who also lived in an age of increasing skepticism about the supernatural, in his Ars Poetica.

From Media College.com:
In the world of fiction you are often required to believe a premise which you would never accept in the real world. Especially in genres such as fantasy and science fiction, things happen in the story which you would not believe if they were presented in a newspaper as fact. Even in more real-world genres such as action movies, the action routinely goes beyond the boundaries of what you think could really happen.

In order to enjoy such stories, the audience engages in a phenomenon known as "suspension of disbelief". This is a semi-conscious decision in which you put aside your disbelief and accept the premise as being real for the duration of the story.

Suspension of disbelief only works to a point. It is important that the story maintains its own form of believability and doesn't push the limits too far. ...

... The initial premise can be quite outrageous as long as the story maintains consistency within that premise. There are many things about the Star Trek universe which are basically impossible in the real world, but because Star Trek makes an effort to work consistently within its own universe, the stories become believable. For example, as long as you're willing to accept that the Galaxy is mostly populated by humanoids then there is nothing within the series that will break the believability....

... One important area of belief is in human actions and emotion. People must act, react and interact in ways which are believable. In cases where such interactions do require suspension of disbelief, the normal rules of consistency apply. Audiences are very unforgiving if they think a character is behaving in an unbelievable fashion.

Jorn Riel:
A story is a true tale that might as well be a lie…
…or just the other way around.