See Also: undecidable(dictionary)

undecidable (iou)



undecidable adjective & noun. M17.
[from UN-1 + DECIDABLE.]
A. adjective.
Unable to be decided. M17.
Math. & Logic. Of a proposition etc.: unable to be either proved or disproved (within a given formal system). M20.
b. noun. That which is undecidable. M20.
undecida'bility noun M20.