Thread: Help Prove/Disprove Paradox

Hi, I'm completely stuck on this hw problem. It's the last one, and I'm completely.... lost. Any help would be much appreciated

Prove or disprove: There exists a book that refers to all those books and only those books that do not refer to themselves


Thanks!

One does not prove or disprove a paradox.
A paradox has these properties.
If A is a paradox then A being true implies that A is false.
As well as, A being false implies that A is true.

If R(A,B) on the set of books means that A refers to B if and only if B does not refer to B then does A refer to itself?

I'm more lost now that before...

But thanks a lot!

Awesome!

I think I got it!

Thanks