[quote=@Unoedipal]
<Snipped quote by Hantu Kongkek>

A big knight guy could also use a spear. Or a craziness that's deactivated. Or magecraft. Or a sword. Basically he could theoretically be anyone besides Assassin. A sword actually makes a lot of sense, since he has a sword. 

I also don't get why "big knight guy" makes you think "one of those classes that's not called a Knight Class".

Basically there's zero reason to assume he's Rider and you're only doing that because you know he's Rider OOC. 

Don't metagame. It's bad.
[/quote]

Yeah this is pretty much my take on this. Discernment of identity might hold a small amount of benefit, but only if the necessary steps and prerequisites are accomplished prior to identifying the other. A crazy person swinging rock-sword at you while snarling might be Berserker, but random knight guy 401243 might be a bit harder to properly identify class. Especially if he doesn't currently have any mounts active.