-named as @code{M-N}.}), or for dispatch based on its arguments
-(@code{SB-PCL::CACHING}, @code{SB-PCL::DISPATCH}). Those in the second
-category can transition into the third, or into a
+named as @code{M-N}, as there is no requirement for the number of
+classes and number of indices to be the same.}), or for dispatch based
+on its arguments (@code{SB-PCL::CACHING}, @code{SB-PCL::DISPATCH}).
+Those in the second category can transition into the third, or into a