>>At 7:29 Uhr -0800 30.03.1999, Dan Ingalls wrote:
>>> 123 size no longer responds with 0.
>>> nil size no longer responds with 0.

That seems like a radical change in the semantics.  Size seems to be
everywhere defined to be the number of indexable variables in the receiver;
so 0 seems like that right answer for objects  that have no indexable
variables.