"Russell's paradox" ki'a?

[Chris Bogart <cbogart@quetzal.com>]

>It was believed prior to about 1900 that there were no problems with
>the intuitive idea that there is a set defined by every predicate
>asserting a property, such as gerku(x). This assumption led to
>Russell's paradox and the need for new foundations of set theory on an
>axiomatic basis. Sooner or later I would guess that we will have to
>deal with problems arising from this same assumption, which is built
>into the lojban number grammar.

What is Russell's paradox?  Is it easily explained or can you give a reference?

                     ____
 Chris Bogart        \  /  ftp://ftp.csn.net/cbogart/html/homepage.html
 Quetzal Consulting   \/   cbogart@quetzal.com