Goal:
    G : t  s0 : VSet.t  x : V.t  s1 : VSet.t  x0 : V.t
  ============================
   (forall
      e : NoConfusion_SPath
            {|
              pr1 := {| pr1 := s0; pr2 := {| pr1 := x; pr2 := x |} |};
              pr2 := spath_refl s0 x
            |}
            {|
              pr1 := {| pr1 := s1; pr2 := {| pr1 := x0; pr2 := x0 |} |};
              pr2 := spath_refl s1 x0
            |},
    let H := CoreTactics.block in
    noConfusion_SPath_obligation_2
      {|
        pr1 := {| pr1 := s0; pr2 := {| pr1 := x; pr2 := x |} |};
        pr2 := spath_refl s0 x
      |}
      {|
        pr1 := {| pr1 := s1; pr2 := {| pr1 := x0; pr2 := x0 |} |};
        pr2 := spath_refl s1 x0
      |}
      (noConfusion_SPath_obligation_1
         {|
           pr1 := {| pr1 := s0; pr2 := {| pr1 := x; pr2 := x |} |};
           pr2 := spath_refl s0 x
         |}
         {|
           pr1 := {| pr1 := s1; pr2 := {| pr1 := x0; pr2 := x0 |} |};
           pr2 := spath_refl s1 x0
         |} e) = e)


DEBUG:Going to execute:
match goal with
           | |- let _ := CoreTactics.block in _ => intros _
           | |- _ => try (intro; CoreTactics.intros_until_block)
           end