My apologies as to my previous post -- I misread Lex's e-mail as an 
attribution of the quoted excerpt to Richard.  It would appear those 
were Lex's words, not Richard's.

On Wednesday, September 11, 2002, at 07:31 PM, Lex Spoon wrote:

> "Richard A. O'Keefe" <ok at cs.otago.ac.nz> wrote:
> [... inline the assertions, too ...]
>
> That's an interesting way to look at the situation, but do note that
> most Smalltalkers will be suprised to find those assertions or
> corrections in removeAll:.  Most fooAll: methods just do: on the
> argument and foo: each element, and have no particular protection
> against #foo: modifying the argument.