I'm talking about what Subaru thought Beatrice is trying to say.
I don't think he ever understood what Beatrice is actually looking for, until maybe right at the end - probably - when he mentioned that Beatrice is always sitting right in front of that door as if she is waiting for someone to drag her out of the library.
His speech was basically so unmemorable and just pointless brabble that I literally can't remember anything other than him "rejecting" her and that part at the end.
If he understood that Beatrice is just supposed to choose "that person" instead of "that person" actually showing up, I'd have guessed he would choose a different approach and line of argument.
Like..
"why do you think the book is empty"
He made that very same question in one episode but said "BECAUSE MAYBE IT'S BROKEN DUUUUUUUHRRRR".... Seriously?
What about
"maybe you are supposed to fill the pages yourself"
or
"the future is for you to decide"
I don't know, anything but his: "IT'S PROBABLY BROKEN!"
I think he said that even though Echidna told him before that she herself gave Beatrice that order just to see whom Beatrice would choose to be "that person"....unless the order of events in my head is wrong.