Embarrassing. I don't know why I thought I had to put brackets... Thanks!

On Thu, Oct 1, 2015 at 5:47 PM, Haoyang Wang <hywang@pobox.com> wrote:

> > On Oct 1, 2015, at 2:41 PM, Ashish Agarwal <agarwal1975@gmail.com>
> wrote:
> >
> > type s = [`A | `B]
> > type t = [s]
>
> type t = s
>
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