Variable inheritance

[Courageous]

>That's because there isn't any.  If an object *is* simultaneously two or
>more types of things (e.g., a table is simultaneously a hard surface AND a
>piece of furniture, whereas a counter-top is just a hard surface), then it
>makes sense to be able to express it as such accordingly.

But yet *is a* relationships are an artificially constrained way of thinking
about MI.

C//