  We discuss a few examples in 2+1 dimensions and 1+1 dimensions supporting a
recent conjecture concerning the relation between the Planck scale and the
coupling strength of a non-gravitional interaction, unlike those examples in
3+1 dimensions, we do not have to resort to exotic physics such as small black
holes. However, the result concerning these low dimensional examples is a
direct consequence of the 3+1 dimensional conjecture.
