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SubjectRe: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
[ Gmail did horrible things to the original post by giving it a base64
content transfer encoding, so majordomo@vger dropped it. It's just
an off-topic digression, but I cared enough to resend anyway, fwiw. ]

On 6/14/07, Jörn Engel <> wrote:
> On Wed, 13 June 2007 14:33:07 -0700, Linus Torvalds wrote:
> >
> > The beauty of the GPLv2 is exactly that it's a "tit-for-tat" license, and
> > you can use it without having to drink the kool-aid.
> One could even add that "tit-for-tat" appears to be the best strategy
> in game theory for continuous runs of the prisoners dilemma.

Tit-for-tat is the best *deterministic* strategy when playing
iterated prisoner's dilemma. But note that "deterministic" and
"rational" are not adjectives that go well with "humans", and
most real-world (social) situations are noisy environments --
miscommunication and misunderstandings are the usual noise.
A double-D noise perceived by any player would throw a
tit-for-tat-playing couple into a perennial spiral of D's, for example,
which is clearly not a Pareto-efficient solution for either.

> At times I
> wonder why game theory isn't taught in schools yet - it might shorten
> discussions like these.

Yes, and no.

Yes - for teaching game theory (and its social relevance) in schools;
and add behavioral economics to this list :-)

No - it doesn't shorten discussions, however. And it shouldn't either.
Human / social situations are complex, Jörn; tit-for-tat can win
computer contests, for example, but it's not a behaviour one person
would find as entirely agreeable in another.

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