Provide the reader with full information

[kirk86]

Hi, I would kindly like to suggest providing the reader with full information of the facts/theorems/proofs etc. regardless of difficulty or notation.

For instance, the following is not really a good representation especially when in the book says that this part is the rigorous one and not the naive set theory

This specific part of the book is all about rediscovering set theory on a rigorous axiomatic way and the above is not IMHO well-suited at all for this part of the book. It could have been fine to claim something like the above in the naive part of the book.