> 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. Marc