[CHOP: lots of examples]

It looks like bool_s could use some general rejiggering. Let me put forth a
concrete proposal that's based on matching bool_ behaviour to that of
Python's bools. There is another route that could be taken where bool_ and
bool are completely decoupled, but I'll skip over that for now since I don't
really think it's a good idea.

  1. +,- are arithmetic operators and return ints not booleans
  2. *,** are arithmetic operators on scalars and arrays and return ints
  as above.
  3. &,|,^ are the logical operators and return booleans.
  4. *,** are defined on matrices to perform logical matrix
  multiplication and exponation.

This seems like the simplest route towards something that is both internally
self consistent and consistent with Python.



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