The result that the Knuth-Bendix algorithm is a special case of the
noncommutative Buchberger algorithm is something that requires further
investigation. Rewriting techniques and the Knuth-Bendix algorithm have
recently been applied to presentations of Kan extensions over sets [6]
and it is not immediately obvious what this will imply for noncommutative
Gröbner bases. Another interesting line of investigation would be to
attempt to adapt rewriting procedures for constructing crossed resolutions of
group presentations [6] to the more general Gröbner basis situation.