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diff --git a/matita/tests/TPTP/Veloci/LAT008-1.p.ma b/matita/tests/TPTP/Veloci/LAT008-1.p.ma
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+
+include "logic/equality.ma".
+(* Inclusion of: LAT008-1.p *)
+(* -------------------------------------------------------------------------- *)
+(*  File     : LAT008-1 : TPTP v3.1.1. Released v2.2.0. *)
+(*  Domain   : Lattice Theory (Distributive lattices) *)
+(*  Problem  : Sholander's basis for distributive lattices, part 5 (of 6). *)
+(*  Version  : [MP96] (equality) axioms. *)
+(*  English  : This is part of the proof that Sholanders 2-basis for *)
+(*             distributive lattices is correct. Here we prove the absorption  *)
+(*             law  x v (x ^ y) = x. *)
+(*  Refs     : [McC98] McCune (1998), Email to G. Sutcliffe *)
+(*           : [MP96]  McCune & Padmanabhan (1996), Automated Deduction in Eq *)
+(*  Source   : [McC98] *)
+(*  Names    : LT-3-f [MP96] *)
+(*  Status   : Unsatisfiable *)
+(*  Rating   : 0.07 v3.1.0, 0.11 v2.7.0, 0.00 v2.2.1 *)
+(*  Syntax   : Number of clauses     :    3 (   0 non-Horn;   3 unit;   1 RR) *)
+(*             Number of atoms       :    3 (   3 equality) *)
+(*             Maximal clause size   :    1 (   1 average) *)
+(*             Number of predicates  :    1 (   0 propositional; 2-2 arity) *)
+(*             Number of functors    :    4 (   2 constant; 0-2 arity) *)
+(*             Number of variables   :    5 (   1 singleton) *)
+(*             Maximal term depth    :    3 (   2 average) *)
+(*  Comments : *)
+(* -------------------------------------------------------------------------- *)
+(* ----Sholander's 2-basis for distributive lattices: *)
+(* ----Denial of the conclusion: *)
+theorem prove_absorbtion_dual:
+ \forall Univ:Set.
+\forall a:Univ.
+\forall b:Univ.
+\forall join:\forall _:Univ.\forall _:Univ.Univ.
+\forall meet:\forall _:Univ.\forall _:Univ.Univ.
+\forall H0:\forall X:Univ.\forall Y:Univ.\forall Z:Univ.eq Univ (meet X (join Y Z)) (join (meet Z X) (meet Y X)).
+\forall H1:\forall X:Univ.\forall Y:Univ.eq Univ (meet X (join X Y)) X.eq Univ (join a (meet a b)) a
+.
+intros.
+autobatch paramodulation timeout=100;
+try assumption.
+print proofterm.
+qed.
+(* -------------------------------------------------------------------------- *)