@amszmidt You get the XOR part. But now let's say one license says "You can have 1 copy" and another says "you can have 10 copies"
As well, the first one says "Cannot be used for military purposes" and license 2 says "Go ahead, what you want."
The obvious thing that would happen in court is "That one user was using his home system and researching out of personal interest." and then you have a problem asserting license 2. 10 people are building bombs. All of them except one is "under the other license" Maybe it's a 6/4 split. Who can tell?
I mean forensics will get you there, but now you have a financial disadvantage on top of that.
I like your saying "Pick one stick to it" <--- the only way licensing works in the real world (ie: if you plan on enforcing it).
(Also, it's not an XOR. Work out the truth table lol... but I'll let it pass ''cos I know what you're getting at. Unless you want 2 court cases, it is just OR)