How to set priority order to Open Graph images for links that are inserted in comments. (Not sharing or wall posts.)

Question

When pasting a link to a page within a comment, not directly as a wall post, Facebook defaults to choosing a thumbnail image, without users being able to choose the relevant

Answer 1

Actually, my experience is that the last tag (farthest down in the header) is given preference. On some of my sites I force the default by manually adding an og:image tag just before the tag.