…[SNIP]….As a judge I don’t see how the ranks would actually be “enforceable” at a table. Player talks about crazy history. I raise my eyebrow and say really. They say … “Hey I traveled with an elori who told me …” I shrug and move on.
Ultimately the game is a collaborative exercise. Make reasonable choices. Unless the knowledge is vital to your character concept follow the guidelines…
Actually, I like the idea of ranks equaling in game knowledge. Just remember that a lack of knowledge does not mean the lack of an opinion.