Clojurians Log v2

the other day i asked about how to audit which query rules are satisfied and favila had a nice suggestion to use ground to return some known value. that works when my "top level" rule returns a grounded value, however i'd like to also audit nested rules as well. any idea how i can aggregate some grounded values from each rule? here is a non-working example that returns an empty result because i think the bound value of ?rule in the parent rule fails to unify on the different bound values in the nested rules.

(let [rules '[[(is-blue ?item ?rule)
               [(ground :is-blue) ?rule]
               [?item :item/color "blue"]]

              [(is-in-stock ?item ?rule)
               [(ground :is-in-stock) ?rule]
               [?item :item/inStock? true]]

              [(blue-items-in-stock ?item ?rule)
               [(ground :blue-items-in-stock) ?rule]
               (is-blue ?item ?rule)
               (is-in-stock ?item ?rule)]]]

  (d/q '{:find  [?item (distinct ?rule)]
         :in    [$ %]
         :where [(blue-items-in-stock ?item ?rule)]}
       (d/db conn) rules))
=> []

=> [[92358976734084 #{:blue-items-in-stock :is-blue :is-in-stock}]]

> [?item :item/inStock? true ?rule] is that 4th element intended?

oops, that was just a typo in the example. thanks for pointing it out.