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That's an approach... Open source textbooks are another: http://inl.info.ucl.ac.be/CNP3



    Students who don’t pay can’t participate in the course and therefore get a lower grade.
The patent kind of forces students to buy the material.


What I meant is that the academic world is divided in two directions. On the one side there are those who believe in making knowledge more readily accessible and the other those who would restrict its accessibility.


The patent can't force students to buy the material, it only forces others with similar 'inventions' to get into license agreement with this, eh, em, ... person.




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