I Don't Know How to Use It, but I Got It. Uh Huh. And Write It Here.

Hildegren says, I don't know how to use it. Thea takes it from Vodilis's hands, implying he did not give it to her. Now this can be argued away as the Severian is just condensing action for expediences sake. But it's very significant right next to the perfect memory claim because he is undercutting his vivid memory right there in front of us.