My practice when approaching a profile like Harry's and using Recycle Unknowns is to go to Find>Search, then all the way down the page to "Search For Any Text" and type in the name of the gedcom. Usually, a long list pops up of many profiles attached to that gedcom. I go through it to see if I can find ANY person who may be attached to that name in some way. Often, I find a spouse, parent, etc. When nothing else shows up, I add the Recycle Unknowns category.