I recently received the following message:
"When you do merges, you should also look for duplicates of the person in the Person Search utility. There usually are several that are not attached to the parents or spouse."
So this is a THIRD way of looking for dupes? (after magnifying glass and "Find Matches")
My experience so far with Find Matches (recently recommended by Chris) is that it finds dupes with or without people attached to a spouse or parent. Trying to understand the distinction between all these dupe-search options.