(if () 1 2) => returns 1 Similarly with s7_nil (as returned from a c binding) I think s7_nil should behave as #f. Opinions? -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://cm-mail.stanford.edu/pipermail/cmdist/attachments/20200908/4f56b3c9/attachment-0001.html>