I wonder if they're referring to cases where the hyphenation opportunities differ for words with different meaning but identical spelling. In some cases, the m

I wonder if they're referring to cases where the hyphenation opportunities differ for words with different meaning but identical spelling. In some cases, the meaning (and hence the accenting, and hence the hyphenation) can only be derived from context, as with "present", which can be hyphenated "pre-sent" or "pres-ent".