Perhaps he simply made an honest mistake, feeling confident that the information wasn't available and thought he was doing a good deed by answering (with a sort of playful jab at the fact that it's not published in the play guide)?
I didn't read anything that sounded like it intended to be antagonistic to the original poster in his reply.
Anyone who's used KR and played with ninjitsu within the last few years would have the answer off the top of his head. Oh that's right, some folk still believe that KR is evil, despite that fact that that's what they're playing now, with a 2D coated sugary wrapper.
Or, anyone who bothered to take 5 min on a test shard.
This wasn't an honest mistake. This was an example of being snarky, just like I'm being at the moment. Cheers.