Rinzler does know better. Rinzler knows how Clu works. What he does. How far he can go, and how thoroughly he digs into what he's claimed.

Rinzler knows, in short, that Chara is right.

Frisk and Asriel aren't empty. But they aren't fighting, either, can't even recognize a reason, and the odds are very small indeed that this could be so easily resolved. What he'll do if (when) that fails, he doesn't know.

[can't]

Noise skips and quiets, and Rinzler bows his head. Agreed.

No forgetting.