Universal Languages
Show that Mini-Scheme is or is not a Universal Programming Language.
Mini-Scheme was described (informally) in Lecture 2:
Note: Weilin Zhong pointed out that in the original lecture, I forgot to include + as an expression. I suspect the inclusion or non-inclusion of + does not effect Mini-Scheme's status as a Universal Programming Language. For the challenge problem, you may use either Mini-Scheme as originally defined (without +), or as corrected (with +).
