What's the adjective for decidest? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs decide and decision which may be used as adjectives within certain contexts.
(computer science) describing a set for which there exists an algorithm that will determine whether any element is or is not within the set in a finite amount of time.
(logic) in intuitionistic logic, a proposition P is decidable in a given theory if it can be proven from the theory that "either P or not P", i.e. in symbols:
“The programmer was relieved to find that the problem he encountered was decidable, as it could be easily solved with the use of an efficient algorithm.”
“A set of positive integers is decidable if there is an algorithm for determining whether any given positive integer belongs to it.”
“There is as yet no warrant for ruling out an arithmetical set that is not decidable, or for ruling out a decidable set that is not arithmetical.”
decisive
Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.