A couple of thoughts on this subject... First, none of us (who write memoirs) knows the actual truth. All we know is what we remember. And memory is never exact.
Second... In writing my memoir, I took a few liberties... If I were writing about a person in a favorable light, I'd use their full name. If writing in an unfavorable light, then first name only. In one of my stories, I had two characters named Fred. As I felt this might be confusing for the reader, I re-named one of them Arnie. And then there's the matter of writing about something I didn't remember at all. I wanted to "paint a picture" of two college friends and I being under-dressed while attending a formal affair. So I described one of us wearing a green sweater and another wearing tennis shoes. I simply made up those details. Yes, we were in fact under-dressed at that event all those years ago. Was one of us wearing a green sweater and another tennis shoes? Who knows? But I made my point and I didn't harm anyone in the process. Bill