Hi Alex,

range/3 seems to work as I expected. Should it not be used here?

(be age (Paul 19) )
(be age (Kate 17) )

(be underage (@X)
  (age @X @Y)
  (range (0 . 18) @Y))

(? (underage @X) )
 @X=Kate





On Sat, Nov 12, 2016 at 10:44 AM, Alexander Burger <a...@software-lab.de> wrote:
> Hi Joe,
>
>> Untested, but what about using range/3 ?
>> http://software-lab.de/doc/refR.html#range/3
>
> Thanks! However, range/3 is probably not useful here. It is a rather
> specialized predicate for range checks in database queries.
>
> ♪♫ Alex
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