reserve X,x for set;
reserve k,m,n for Element of NAT,
  p,q,r,s,r9,s9 for Element of HP-WFF,
  T1,T2 for Tree;
reserve T1,T2 for DecoratedTree;
reserve t,t1 for FinSequence;

theorem Th29:
  VERUM <> prop n
proof
  assume
A1: not thesis;
  VERUM.1 = 0;
  hence contradiction by A1,FINSEQ_1:40;
end;
