“exactly what are the ‘ruling constraints’ to this problem?”

The ruling constraints are clearly and concisely laid out in the OP; you're either too lazy to read them properly; or too dumb to understand them.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Bidirectional lookup algorithm? (Updated: further info.) by BrowserUk
in thread Bidirectional lookup algorithm? (Updated: further info.) by BrowserUk

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