[E-Lang] An Attempted Restatement of Hydro's Semantics

[Marc Stiegler]

> One case where the middle elements are special is when doing a binary
> search.  Matrix inversion, multiplication etc. also make interesting uses
> of indexing.  It might be a useful experiment to see what an E matrix
> inversion routine looks like.

Binary search assumes a sorted, which I explicitly excluded from my
description :-) Nonetheless, there still seems to be a case for indexability
hanging around out there, though it is much weaker than I would have
predicted.

--marcs