Computers and Technology, 17.12.2019 18:31 webbjalia04

What are the semantics of choice and fail statements?

(a) a choice statement allows alternatives to be explored, while a fail statement indicates no answer at that branch.
(b) there are no choice and fail statements in oz.
(c) a choice statement displays a search tree, while a fail statement indicates a unification failure.
(d) a choice statement indicates no answer at that branch, while a fail statement allows alternatives to be explored.

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What are the semantics of choice and fail statements?

(a) a choice statement allows alt...