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2021-03-23
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I have the following (working) predicate:
It is true, if ?user and ?proposal don't have a common ?opinion or if they do, the ::value of said ?opinion is 0.
[(undecided? ?user ?proposal)
(or-join [?user ?proposal]
(not
[?user ::user/opinions ?opinion]
[?proposal ::proposal/opinions ?opinion])
(and
[?user ::user/opinions ?opinion]
[?proposal ::proposal/opinions ?opinion]
[?opinion ::value 0]))][?user ::user/opinions ?opinion] twice, but I can't figure it out. Can anyone can tell me if my suspicion is right and how I can improve the predicate?