Much of the creative work that I produce is a modification derived from other persons' previous work. Since the other persons may reserve legal rights to their work, you might not have legal permission to do what you want with my work, even as far as copyright and patent law are concerned. But that could only be because you did not have permission from the other persons; you already have permission from me.
I request that you give me credit for my work, and that you offer any derivative works and so forth to other people with no conditions, as I have offered this work to you with no conditions. But I will not enforce these requests legally; they are not requirements. You will have to decide for yourself.
If renouncing your entire legal monopoly seems too radical to you, then try a Creative Commons licence for your work; but I strongly recommend that you not use the NonCommercial option. For computer programs, try the GNU General Public License. But I recommend that you not use the GNU Free Documentation License.
Similarly, I have not given you permission to quote me selectively in order to mislead people about my opinions, to spread personal information that I've asked you to keep secret, to gouge customers who do not realise that what you're selling them is available free online, or otherwise to engage in practices that are unethical for reasons other than copyright and patent monopolies (and were unethical centuries ago before copyrights and patents were invented). But even if you do such things, I still will not use copyright or patent law against you.
This web page was written between 2002 and 2012 by Toby Bartels, last edited on 2012 March 26. Toby reserves no legal rights to it.
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http://tobybartels.name/copyright/.