% Mizar problem: t20_projpl_1,projpl_1,509,43 
fof(t20_projpl_1,conjecture,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ! [B] : 
          ( m1_subset_1(B,u1_incsp_1(A))
         => ! [C] : 
              ( m1_subset_1(C,u1_incsp_1(A))
             => ! [D] : 
                  ( m1_subset_1(D,u1_incsp_1(A))
                 => ! [E] : 
                      ( m1_subset_1(E,u1_incsp_1(A))
                     => ! [F] : 
                          ( m1_subset_1(F,u2_incsp_1(A))
                         => ! [G] : 
                              ( m1_subset_1(G,u2_incsp_1(A))
                             => ! [H] : 
                                  ( m1_subset_1(H,u2_incsp_1(A))
                                 => ( ( r5_projpl_1(A,B,C,D,E)
                                      & r3_incproj(A,B,C,F)
                                      & r3_incproj(A,B,D,G)
                                      & r3_incproj(A,B,E,H) )
                                   => r1_incproj(F,G,H) ) ) ) ) ) ) ) ) ) ),
    inference(mizar_bg_added,[status(thm)],[d5_incproj,d6_projpl_1,dt_l1_incsp_1,dt_m1_subset_1,dt_u1_incsp_1,dt_u2_incsp_1,existence_l1_incsp_1,existence_m1_subset_1,rc1_xboole_0,rc2_xboole_0,t11_projpl_1,t19_projpl_1]),
    [file(projpl_1,t20_projpl_1)]).

fof(d5_incproj,axiom,(
    ! [A,B,C] : 
      ( r1_incproj(A,B,C)
    <=> ( A != B
        & B != C
        & C != A ) ) ),
    file(incproj,d5_incproj),
    []).

fof(d6_projpl_1,axiom,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ! [B] : 
          ( m1_subset_1(B,u1_incsp_1(A))
         => ! [C] : 
              ( m1_subset_1(C,u1_incsp_1(A))
             => ! [D] : 
                  ( m1_subset_1(D,u1_incsp_1(A))
                 => ! [E] : 
                      ( m1_subset_1(E,u1_incsp_1(A))
                     => ( r5_projpl_1(A,B,C,D,E)
                      <=> ( ~ r4_projpl_1(A,B,C,D)
                          & ~ r4_projpl_1(A,C,D,E)
                          & ~ r4_projpl_1(A,D,E,B)
                          & ~ r4_projpl_1(A,E,B,C) ) ) ) ) ) ) ) ),
    file(projpl_1,d6_projpl_1),
    []).

fof(dt_l1_incsp_1,axiom,(
    $true ),
    file(incsp_1,l1_incsp_1),
    []).

fof(dt_m1_subset_1,axiom,(
    $true ),
    file(subset_1,m1_subset_1),
    []).

fof(dt_u1_incsp_1,axiom,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ~ v1_xboole_0(u1_incsp_1(A)) ) ),
    file(incsp_1,u1_incsp_1),
    []).

fof(dt_u2_incsp_1,axiom,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ~ v1_xboole_0(u2_incsp_1(A)) ) ),
    file(incsp_1,u2_incsp_1),
    []).

fof(existence_l1_incsp_1,axiom,(
    ? [A] : l1_incsp_1(A) ),
    file(incsp_1,l1_incsp_1),
    []).

fof(existence_m1_subset_1,axiom,(
    ! [A] : 
    ? [B] : m1_subset_1(B,A) ),
    file(subset_1,m1_subset_1),
    []).

fof(rc1_xboole_0,axiom,(
    ? [A] : v1_xboole_0(A) ),
    file(xboole_0,rc1_xboole_0),
    []).

fof(rc2_xboole_0,axiom,(
    ? [A] : ~ v1_xboole_0(A) ),
    file(xboole_0,rc2_xboole_0),
    []).

fof(t11_projpl_1,axiom,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ! [B] : 
          ( m1_subset_1(B,u1_incsp_1(A))
         => ! [C] : 
              ( m1_subset_1(C,u1_incsp_1(A))
             => ! [D] : 
                  ( m1_subset_1(D,u1_incsp_1(A))
                 => ( r4_projpl_1(A,B,C,D)
                   => ( r4_projpl_1(A,B,D,C)
                      & r4_projpl_1(A,C,B,D)
                      & r4_projpl_1(A,C,D,B)
                      & r4_projpl_1(A,D,B,C)
                      & r4_projpl_1(A,D,C,B) ) ) ) ) ) ) ),
    file(projpl_1,t11_projpl_1),
    []).

fof(t19_projpl_1,axiom,(
    ! [A] : 
      ( l1_incsp_1(A)
     => ! [B] : 
          ( m1_subset_1(B,u1_incsp_1(A))
         => ! [C] : 
              ( m1_subset_1(C,u1_incsp_1(A))
             => ! [D] : 
                  ( m1_subset_1(D,u1_incsp_1(A))
                 => ! [E] : 
                      ( m1_subset_1(E,u2_incsp_1(A))
                     => ! [F] : 
                          ( m1_subset_1(F,u2_incsp_1(A))
                         => ~ ( ~ r4_projpl_1(A,B,C,D)
                              & r3_incproj(A,B,C,E)
                              & r3_incproj(A,B,D,F)
                              & E = F ) ) ) ) ) ) ) ),
    file(projpl_1,t19_projpl_1),
    []).