On Wed, 6 Jan 2016 11:33:48 -0500, "Mr. Luddite"
wrote:

What about the 2/3rds that *are* solved? Is your glass two thirds full
or one third empty?

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Greg's point is that more than half of those 2/3rds are no brainers
that require no work at all because the perpatrator is self evident.