Can I use my own Stack Exchange answer in a book? I’ve seen some similar questions, but was wondering about a more specific case. I wrote a Stack Exchange answer, and would like to use it in one section of a book I’m writing (which will be commercially sold). I also modified the answer, and added to it, but some original passages remain. I’m wondering if, as the author, and with proper attribution that the section is based on my Stack Exchange answer, with a link, this is legally acceptable?
Yes, that’s allowed. Under the Stack Exchange terms of service, content you upload is licensed to Stack Exchange Inc. on a non-exclusive basis under CC-BY-SA 4.0. The terms of service do not give Stack Exchange the copyright to your contributions, and a non-exclusive license means you are not promising Stack Exchange that “only Stack Exchange will be allowed to use this content.” That means you can continue to do whatever you want with your own content and do not need to mention Stack Exchange at all. The only restriction is that you can’t stop Stack Exchange from continuing to use your Stack Exchange content under CC-BY-SA 4.0, and since it’s a Creative Commons license you also can’t stop anyone else from using your Stack Exchange content under that license.
Yes That is very simple - copyright is an exclusive right that starts automatically with the creation of a copyrightable work. The default situation is that the author has an exclusive rights to make copies of the work and derivative works. If the code is published somewhere by the author but the author has not said anything about its licence or copyrights, then the default situation applies - you need permission and you don't have it, so it's not legal for you to distribute their copyrighted works. They have the right to just publish it somewhere, others don't. If you try to contact the author and they don't say anything and ignore you, then the default situation applies - you need permission and you don't have it, so it's not legal for you to distribute their copyrighted works. If it's impossible to find the author (e.g. I have certain cases with literary works where it's not clear who inherited the rights after the author died), then the default situation applies - you need permission and you don't have it, so it's not legal for you to distribute their copyrighted works. That being said, certain forms of reuse (recreating ideas, learning from them, etc) would not be a copyright violation. But in general the situation with the author not saying anything is almost the same as the author explicitly stating "all rights reserved, you're not allowed to do anything, violators will be shot" - some specific uses are allowed even against author's wishes (e.g. 'fair use' clauses) but everything that needs their permission really does need their explicit permission.
On what grounds would you sue? Contract Well, I think that you would struggle to find the necessary elements (see What is a contract and what is required for them to be valid?) In particular, you would struggle to prove that there was intention to create legal relations on their part and possibly on yours. Are you able to identify in your "back &amp; forth" a clear, unequivocal offer and acceptance? Without knowing the details of the "back &amp; forth": I was hoping that someone at $organization might be willing to write an article explaining what you do, the history of the organization and how it works appears on the face of it to be a request for a gift; not an offer to treat. Promissory Estoppel If you don't have a contract then it is possible (IMO unlikely) that they induced you by your actions to commit resources (your time in writing) in anticipation of a reward (them publishing what you wrote). To be estopped they would have to have known that you were writing the article in the expectation that it would have your organisation's name in it, that they did not intend for that to happen and that they allowed you to invest those resources notwithstanding. If you can prove all of that then you can require them to do what they promised. The big difficulty I see in this is did you tell them that a) you were writing the article, b) it would have your name in it and c) you expected it to be published in that form. Copyright If they publish the work or a derivative work without your permission you can sue for breach of copyright. As it stands, they probably have an implied licence to publish and you would need to explicitly revoke that. Options There are two reasons to go to court: Money Principle If you are going to court for money then this is at best a risky investment and at worst a gamble: balance your risk and reward carefully. If you are going to court for a principle then I simultaneously admire your principles and think you're an idiot. Make a deal Explain that the reason that you wrote the article was a) to support their fine publication and the fantastic work it does (even if you don't) and b) to garner good publicity for your organisation. You understand and admire their strong editorial stance (especially if you don't) but the article involved a considerable amount of work and could they see their way clear to give you a significant discount (~80%) on a full page ad facing the article.
You can do whatever you like with posts made after you change the rules - you have to leave the previous stuff alone. The contributors' have accepted the terms of the licence: They own the copyright or have permission from the copyright holder to post it (the promise) They agree that it can be edited altered or removed CC-BY-SA allows people to copy the stuff off the website and republish it - this is way outside what the contributors agreed to. These people have given permission for their work to be altered but not copied.
Yes So far so good. This is a copyright violation but it is probably fair use - certainly there is case law permitting a copy of a backup digital asset to be made so I don’t see why a similar argument wouldn’t work with backing up a physical book. Clear copyright violation. Alice can rent out the original under the first sale doctrine but the ‘backup’ is not so protected. It’s not fair use because it’s use is commercial, the work is a type of work the author expects to profit from, the entire work has been copied and the use is deleterious to the market i.e. the renters are less likely to buy an original - it falls foul of all four factors of the fair use test.
Yes. Content not created by a user is not protected by Section 230, and if the platform agents or employees begin to substantively edit content, the platform becomes a co-author rather than merely a platform for that content.
This is not (necessarily) copyright violation It's possible that Quora's usage falls within Fair Use. At the very least, the argument could be made. If it does, then there is nothing that Stack Exchange or the OP can do. Stack Exchange can choose not to protect their copyright Unlike trademarks, which lapse if not protected, copyright endures. Therefore Stack Exchange can pick and choose the copyright fights they want to get involved in and those they don't. If you have brought it to the attention of the copyright owner (or, in this case, licensee) and the copyright owner chooses not to act then you have done all you can and significantly more than you have to do. The OP has copyright I note that one of the examples is your question. As the copyright holder, you are free to issue a DCMA takedown notice on Quora if you feel your copyright has been violated.
Copyright includes authorization of derivative works such as translations, so you must have permission of the copyright holder to create a translation. You could be sued for creating the unauthorized translation for your friend. If you attempt to further distribute the book, the chances of getting sued increase substantially. That path probably includes your legal obligation to foot the bill for the publisher and distributor having to defend themselves in court, since your contract with the publisher or distributor probably includes an indemnification clause saying that you indemnify them (pay their costs) against damages for your infringement. So your are at risk, and it increases if you do anything to distribute the translation.