Others have claimed that the conceivability of a scenario may not entail its possibility.
From the en.wikipedia.org
This lie results in a contradiction in conceivability and therefore the lie is in conflict with duty.
From the en.wikipedia.org
Regardless of your decision, book Keith Hackett and Paul Trevillion for pushing the boundaries of conceivability just a little bit too far.
From the guardian.co.uk
These tightening links raise the conceivability of a global organization, or perhaps a loose confederation, with a single leader-a boss of all bosses of world terrorism.
From the time.com
More examples
Conceivableness: the state of being conceivable
Fertilisation (also known as conception, fecundation and syngamy), is the fusion of gametes to produce a new organism. In animals, the process involves the fusion of an ovum with a sperm, which eventually leads to the development of an embryo. ...