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A comment on Ask HN: Book Recommendations?. Parent comment

Re:Ask HN: Book Recommendations? by goc on Saturday March 05, 2016 @08:14PM (#11231990)
In this video[0] Van Roy claims that the function Three "resolves" to 3. It's at around 8:45 minute. I tried working that out, but can't seem to get it correct. What I tried

   {Inc {Inc {Inc Zero}}}
   {Inc {Inc 1}}
   {Inc {1} + 1}
   {{{1} + 1} + 1}
Can we consider {{{1} + 1} + 1} to be 3 or what are my mistakes? Thanks.

[0] https://youtu.be/Arh_6J5_fWU?t=8m46s

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