For everyone’s handy reference, I dredged up a Forum comment from Dennis Venema about four months ago where he was going back and forth with GJDS over this very issue. (I was hoping to find a more elaborate blog post, but this’ll do. It’s what Google brought me first when I searched for “Dennis Venema” and “most recent common ancestor.”) I thought it’d be easier than trying to wrangle Dr. Venema in by tagging him.