Re: [xml-dev] The Einstein Puzzle

[Arjun Ray <arjun.ray@verizon.net>]

On Mon, 15 Jan 2018 13:59:59 +0000, "Costello, Roger L."
<costello@mitre.org> wrote:

| The Einstein Puzzle

Gosh, this brought back memories!  I saw this in the Reader's Digest a
_very_ long time ago, but some details were different.  In particular,
there were two questions:
	1. Who drinks water?
	2. Who owns the zebra?

A zebra is an outlandish pet, which is basically why this puzzle stuck
in my memory. 

And sure enough, it's in Wikipedia (which, if accurate, shows further
differences in detail):

   https://en.wikipedia.org/wiki/Zebra_Puzzle 

[ObSchema: what if a set of constraints have _no_ "solution"?  Can we
detect this infelicity in advance?]