discontiguous predicate

[carlos calderon]

hi all,

 

I've got a simple list of facts,  i.e:

 

female(joan).

male(david).

male(paul).

female(rachel).

 

Well, if i try to compile this, it gives me a warning: discontiguous predicate female/1.

Ok, I can change the order of my predicate to make them "contiguous" but that's not a proper solution.

I went to the gnu_prolog manual, pag-42 section 5.1.5 and based upon that I thought this might work:

discontiguous(female).

female(joan).

male(david).

male(paul).

female(rachel).

 

but it didn't. I got the same warning.

 

Again, apologies if the question has been answered before but I am new to the list and on the steep end of prolog's learning curve.

 

-Carlos