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(eq? eqv? eq?)

>    Does R4RS require that (eq? memv? memq?) be #f?
> etc...

A similar question of mine that has remained unanswered is:

  what is the value of (let ((x 1)) (eq? x x)) ?

I know that (eq? 1 1) is either #t or #f (because the two 1's may
be different objects).  But in the above, both references to
"x" should return the same (i.e. identical) object.