<> (eq ?x ?x) (#t) <> (eq ?x ?y) (#f) <> (q ?x) (q ?x) <> (if ?c ?t ?f) (if/q ?c q ?t q ?f) <> (if/q (#t) q ?t q ?f) (?t) <> (if/q (#f) q ?t q ?f) (?f) if (eq foo bar) (if (eq foo baz) a b) (if (eq foo foo) b c)