Plane Sailing said:So instead I'll just point out that knights chose big weapons to hit each other with, not daggers. The one exception I can think of is the misericord, a dagger used for "mercy killing" which had a narrow blade that could be thrust through chinks in the armour of a downed foe to finish him off. You could easily replicated that with an exotic weapon dagger which ignored DR when performing a coup-de-gras. Fact is, that real world daggers were *not* made to "pierce full plates"
Regardless, there are a lot of character archetypes that revolve around anachronisms, and a realistic combat system isn't always the best one. Heck, I'd go so far as to say it's _rarely_ the best one.