Wahrnehmung/Anschauung, Dasein/Existenz?

Ich weiss es nitch.

Lesen das Buch, bitte.

donaudampfschifffahrtsgesellschaftskapitaenswitwe.

Well, she said she was a widow, but who knows?

What?

I really would question if her late husband wasn't just a second mate and not a captain!

Ja wohl! But could you please at least enlighten me, in which section(s) of which book(s) of Kant did he specify, explicitly, the difference between the two items of each pair? "das Buch" ist viel zu vage.