  In his seminal paper that inaugurated abstract argumentation, Dung proved
that the set of complete extensions forms a complete semilattice with respect
to set inclusion. In this note we demonstrate that this proof is incorrect with
counterexamples. We then trace the error in the proof and explain why it arose.
We then examine the implications for the grounded extension.
  [Reason for withdrawal continued] Page 4, Example 2 is not a counterexample
to Dung 1995 Theorem 25(3). It was believed to be a counter-example because the
author misunderstood ``glb'' to be set-theoretic intersection. But in this
case, ``glb'' is defined to be other than set-theoretic intersection such that
Theorem 25(3) is true.
  The author was motivated to fully understand the lattice-theoretic claims of
Dung 1995 in writing this note and was not aware that this issue is probably
folklore; the author bears full responsibility for this error.
