Let me address the elephant in the room and that is I agree, you should know about your craft that is the dirty 16. Having said that, why is it that lawyers, doctors, chemists and engineers can have their reference library's but the FI, it seems, is the only expert that should remember everything he has ever read? Do you think a Lab guy, one that says he knows everything there is to know about chemistry, would forget a little here and there when in front of person with an open chem book asking questions? I bet you he or she cannot retain all either. I don't know about the rest of you here, but I'm not as young as I used to be and cannot remember everything and sometimes nothing. 921 is now three times as big as it was when it first came out. That's hundreds of pages more info to retain and more technical info. If I can't recall an item, definition or formula I do know where to go to get that info when it involves a case in which the issue at hand is involved. I think this is somewhat a dog and pony show saying if you cant recall this information on the spot you are not an FI. Going into a depo will reveal what that FI is and how they came to that conclusion in my opinion. Did you know that the mere definitions of all facets of just thermodynamics makes a book that is almost a half an inch thick just by itself? This is not to say your shouldn't remember alot of it or the basics.