If I knock back my opponent and he goes to elevated but is at a ladder would he go "up" the ladder or hit the elevated terrain?

"The rules for stairs and ladders allow movement and close combat through 2 squares of different elevations if they (a) are otherwise adjacent squares and (b) are squares that include a traiangle with the elevation level."

I would say no damage, as there's no wall, he'd just move up an elevation.

What he *did not* said.

But you are not moving when you are knocked back. I say he takes damage as if hitting blocking terrain. That's how I've always played it.

I'm in this corner

i think that you can´t go "up" in the lader because it´s not movement itself, it´s placement, and stop your KBpath in the last gronded terrain, then you get KB damage

Due to the underlined above, you would hit the wall and be dealt one damage. While stairs can be moved between to change elevations, they are still different elevations.