Every other horror I could think of at least had odds or prognoses.
We know what clever structures of conjectures and prognoses have been built on these foundations.
1650s, "forecast of the probable course of a disease," from Late Latin prognosis, from Greek prognosis "foreknowledge," also, in medicine, "predicted course of a disease," from stem of progignoskein "come to know beforehand," from pro- "before" (see pro-) + gignoskein "come to know" (see gnostic). General (non-medical) use in English from 1706. A back-formed verb prognose is attested from 1837. Related: Prognosed; prognosing.
prognosis prog·no·sis (prŏg-nō'sĭs)
n. pl. prog·no·ses (-sēz)
A prediction of the probable course and outcome of a disease.
The likelihood of recovery from a disease.
A medical prediction of the future course of a disease and the chance for recovery.
Note: Prognosis is often used as a general term for predicting the unfolding of events: “The governor said that the prognosis for the state's financial future is bleak.”