Definition AnnTyping_AnnCtx  := first  ann_ctx_wff_mutual.Definition AnnPropWff_AnnCtx := second ann_ctx_wff_mutual.Definition AnnIso_AnnCtx     := third  ann_ctx_wff_mutual.Definition AnnDefEq_AnnCtx   := fourth ann_ctx_wff_mutual.

Lemma AnnCtx_uniq G : AnnCtx G -> uniq G.