dependencies - prolog predicate dependency tree -


let's have scenario:

ascendent(x,y) :- parent(x,y). ascendent(x,y) :- parent(x,z), ascendent(z,y).  brother(x,y):-parent(z,x),parent(z,y), x \= y . uncle(x,y):-brother(x,z),parent(z,y),x \= y.

how can know predicates used ascendent , predicates uses ascendent? there built-in function or meta-predicate useful task?


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