Question to Papyrus Knight believers

Why do you guys think it's Papyrus? Genuinely wondering. It seems like a cool concept (and I'm also a mega Papyrus fan)

Cause he’s missing
And idk the trousle of bones keeps getting fainter so maybe he’s losing himself as the knight
Also nyeh heh heh

If you think about it yeah we don't even see Paps, and I heard some argue that some of his body proportions align with the Knight. There are probably more reasons why people do believe this theory but Idrk that much tbh...

"The Knight is Papyrus, dude. Pim, we need to take this to our graves! This changes literally everything. Get back. I think I'm gonna throw up. Get back, dude."