Well, you can throw that out.

Why?

Because it's useless.

Why?

Because you want to understand dreams. But that book is old, and we know a lot more than we used to.

Is that how knowledge works? Etiology is important to doctoring, but history is useless to ideas?

Well, you can burn that book.

What did the Nazis do again? To this author's books?

...

They had the right idea?