Module fc_dec_aux (wf : fc_wf_sig) (weak : fc_weak_sig) (subst : fc_subst_sig) (unique: fc_unique_sig).
(**** Decision procedures for a few auxiliary relations ****)

Lemma uniq_binds_dec_tm : forall x G, uniq G -> {A | binds x (Tm A) G} + {(forall A, ¬ binds x (Tm A) G)}.