(0) Obligation:
Clauses:
list([]).
list(X) :- ','(no(empty(X)), ','(tail(X, T), list(T))).
tail([], []).
tail(.(X, Xs), Xs).
empty(X).
no(X) :- ','(X, ','(!, failure(a))).
no(X1).
failure(b).
Query: list(g)
(1) PrologDeterminacyProcessorProof (EQUIVALENT transformation)
The root node satisfies the determinacy criterion.
(2) YES