On Jun 11, 2007, at 08:26 , Rick DeNatale wrote:

> Actually overriding doeNotUnderstand: in Smalltalk is rather common
> for much the same reasons it's used in Ruby.
>
> For example, when I wrote the Smalltalk distributed feature for IBM
> Smalltalk about 10 years ago, doesNotUnderstand was a key underpinning
> of the implementation.

seconded.