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Equivalence predicates

The Revised^n Report on Scheme does not specify the result of
eq?, eqv?, and equal? applied to ports and end-of-file objects.
Is this intentional?  E.g. what is the result of

       (equal? (read) (read))

provided that both reads return an end-of-file object?

Regards,
--
Oliver Laumann              net@TUB.BITNET              net@tub.UUCP