>
> We have
>
>         (Bag with: 1 with: 1 with: 1) intersection: (Bag with: 1)
>         -->
>         (Bag with: 1 with: 1 with: 1)
>
> and:
>
>         (Bag with: 1) intersection: (Bag with: 1 with: 1 with: 1)
>         -->
>         (Bag with: 1)
>
> Is that a bug or a feature?
>

Such abstract behavior can't be classified as either.  The decision has to
be based on the receiver of #intersection: message.  Note Array behaves the
same.

Best,
  Chris
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