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there are always values for A and B for any C and viceversa for any A and B there is always a value of C.
Yes, but thene you would be assigning specific values of a, b, and c.
You can only say that "a^2+b^2=c^2" is a theorem if it holds for all a, b, and c. (e.g. "a^2-b^2 = (a+b)(a-b)" holds for all values of a and b). Otherwise, you need to define what a, b, and c you are talking about in order to have a complete theorem.
In order to install the files onto a customer's machine, I have to copy the files onto their machine, and so yes, I am distributing it. If I install both Moodle, and Microsoft's plugin, then I am distributing them as a combined work.
If you want to assume that Microsoft won't sue you, then that's up to you. Companies usually do not have the luxury of saying "oh, let's just cross our fingers and hope they don't sue". Companies have to play it safe. Besides, it's not just Microsoft who can sue, but also any of the many copyright holders of Moodle, plus any of the authors of the additional plugins that I happen to also install on the customer's machine.
Thanks for the clarification, Martin. I'm glad to hear that they're working on resolving the issue. (Of course, if they're afraid of the patent clauses in GPLv3, then they could always just release their code under some other GPLv3-compatible license.)
No, because if you are installing on a customer's computer, you are distributing, and so you would be breaking the license.
No, they didn't, which causes a problem since Moodle is being relicensed to GPLv3.
In fact, it would be stupid on their part to release source code to work with programs under incompatible license terms which would disallow anyone from legitimately being able to distribute it.
And yet, that's exactly what Microsoft did. Moodle is switching to GPLv3, and Microsoft's plugin is GPLv2 only.
Actually, the original software (Moodle) is moving to GPLv3, while Microsoft has released their plugin under GPLv2 only which makes it impossible for anyone to legally distribute Moodle with Microsoft's plugin. Not only that, but Moodle had previously be licensed under GPLv2 or later, so using a GPLv3 plugin was always fine. So it would have been better if Microsoft had used GPLv3 instead.
Hmpf. 128MB? My first USB drive was a whopping 8MB! And I still haven't figured out what to do with all that space. I usually transfer files over the network, so what would I need a USB drive for?