reserve L for Lattice;
reserve X,Y,Z,V for Element of L;
reserve L for D_Lattice;
reserve X,Y,Z for Element of L;
reserve L for 0_Lattice;
reserve X,Y,Z for Element of L;

theorem
  X [= Y & X [= Z & Y misses Z implies X = Bottom L
by Th9,FILTER_0:7;
