| All of the options mentioned assume that {ka} and {du'u} remain separate.
Should they be combined, then only option 1 (all {ce'u} in place) remains, since the general rule for dropping {zo'e} takes precidence. It would be possible to work out some way to drop some {ce'u} perhaps, but hardly seems worthwhile. I oppose the collapse of {ka} and {du'u}, not only for this reason but also to maintain the useful practical distinctions between them, however theorretically unifed they are. |