Re an option for “Don’t know / Unsure”; I would be willing to wager that this is where most GA and many commercial pilots sit.
After all, why would we ever delve into the reg’s unless we really had to? Only when you get stuck into the issue in some detail (sitting an air law exam at any level, figuring out what you can or cannot do as an operator, instructor etc) do you realise just how incredibly convoluted, inconsistent and obtusely shambolic it all is.
Our regulations are absolutely not clear and are manifestly not concise.