Comparison To Copyleft
Further information: CopyleftCopyleft is "a general method for making a program or other work free, and requiring all modified and extended versions of the program to be free as well." By comparison with permissive licences, copyleft licensing places more requirement in terms of distribution and combination with software under other licences.
Read more about this topic: Permissive Free Software Licence
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“The comparison between Coleridge and Johnson is obvious in so far as each held sway chiefly by the power of his tongue. The difference between their methods is so marked that it is tempting, but also unnecessary, to judge one to be inferior to the other. Johnson was robust, combative, and concrete; Coleridge was the opposite. The contrast was perhaps in his mind when he said of Johnson: “his bow-wow manner must have had a good deal to do with the effect produced.””
—Virginia Woolf (1882–1941)