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> Consider the following: > > hjstein@bacall:~$ guile > guile> (eq? (string->symbol "-a") '-a) > #t > guile> (eq? (string->symbol "-b") '-b) > #t > guile> (eq? (string->symbol "-i") '-i) > #f > Is this expected behavior for an R4RS scheme which supports complex > number? Yes. Since (number? '-i) ==> #t > If so, it's a real pain in the ass for command line > processing... You need to compare strings. You will have to use equal? or string=?, because eq? is not usable with strings. Afait, -a and -b aren't portable identifiers either. See the report.