Definition t := ascii.Definition eq       := @Logic.eq       ascii.Definition eq_refl  := @Logic.eq_refl  ascii.Definition eq_sym   := @Logic.eq_sym   ascii.Definition eq_trans := @Logic.eq_trans ascii.Definition eq_dec   := ascii_dec.Definition lt (c d : ascii) : Prop := (N_of_ascii c < N_of_ascii d)%N.

Theorem lt_not_eq : forall c d : ascii, lt c d -> ~ eq c d.