No he obviously meant interrupt. If he meant KB he wouldn't have said to save your stun. Not to mention every class does not have a KB. He said use your interrupt which assumes every class has one.
Honestly I'm not surprised stuff like this is coming out.
Every class does have an interrupt and yes I meant any form of interrupt aside from stun yes go ahead use stun to interrupt my ravage I'll eat it spam massacre and force scream since my Ataru proc gives me auto crit on force scream. And guess what you are screwed when I pop UR cuz guess what I'm probably at full resolve so stun is not gonna work and you get to eat everything I throw at you. Thats pretty much how I get 90% percent of my kills in pvp.