Goal:
    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p
  ============================
   (x = a \/ x = a \/ VSet.In a p)


DEBUG:Going to execute:
elim id
Level 3: evaluation returns
<coq-core.plugins.tauto::is_disj@0>
where
tauto_flags := 
of type
tauto_flags
X1 := x = a \/ VSet.In a p
of type
constr of type tacvalue


Goals:
    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p
  ============================
   (x = a -> x = a \/ x = a \/ VSet.In a p)

    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p
  ============================
   (VSet.In a p -> x = a \/ x = a \/ VSet.In a p)


DEBUG:Going to execute:
intro
DEBUG LTAC Evaluated term: H

Goals:
    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p
  ============================
   (x = a -> x = a \/ x = a \/ VSet.In a p)

    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p
  ============================
   (VSet.In a p -> x = a \/ x = a \/ VSet.In a p)


DEBUG:Going to execute:
<coq-core.plugins.ltac::intro@0>

Goals:
    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p  H0 : x = a
  ============================
   (x = a \/ x = a \/ VSet.In a p)

    x : V.t  p : VSet.t  a : V.t  H : x = a \/ VSet.In a p  H0 : VSet.In a p
  ============================
   (x = a \/ x = a \/ VSet.In a p)


DEBUG:Going to execute:
clear id