On Tue, Aug 1, 2017 at 5:14 PM Olumide <50295 at web.de> wrote: > Of course 's' is not a type variable as its lowercase. > But type variables *are* lowercase. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.haskell.org/pipermail/beginners/attachments/20170808/ebd6546a/attachment.html>