If Van Gogh is in Public Domain, why there are restrictions in the Van Gogh museum? I've been to the Van Gogh museum in Amsterdam, and I was a little disappointed because there were no pictures of some of his most famous work - "The Starry Night" and "Starry Night Over the Rhône". Well, it is well known that Van Gogh artwork is in public domain, according to this question. And I also know that these artworks are in the MoMA (New York City) and in the Musée D'Orsay (Paris). But why can't the museum use a replica? Or sell derived artwork in the museum shop? Or in the art books sold there? Or even tell us about these paintings during the history and life of Van Gogh presented in the museum? It was like these paintings never existed!
There isn’t a legal restriction Which is to say they could show replica’s if they wanted to; they just don’t want to. This is fairly typical - art museums display art, not reproductions of art. They also tend to be interested in displaying the art they have, not telling the life story of the artist.
This appears to mean that the author, while retaining copyright, is allowing anyone to make copies without asking permission from the author. This would seem to be similar to a CC-BY license, or perhaps more exactly a CC-BY-ND license, as the author has apparently not granted the right to create modified versions or other derivative works. This does not require one who makes such copies to distribute them free of charge, unless there is another provision not mentioned in the question. Amazon, or anyone else, would be free to sell copies at any price they cared to ask. If the author wanted to limit the sales price, that would take another provision, and might not be enforceable.
Under US law, and I believe under the laws of most countries, each of the various photographs of the apple would be protected by copyright. Thew initial owner would be the photographer, or perhaps the photographer's employer, in each case. Copyright protects expression, including both words and image. It does not protect ideas. The idea of an apple is not protected. The specific representation of a particular apple would be. If the painter imitates the specific feature of the apple shown in the photographs, to the extent that the painting is a derivative work of one or more of the photos, then the painter needs the permission of the copyright holder(s). Without that permission, creating the painting is infringement of copyright. However, if the painter merely took the general idea of an apple, and created a new expression of that idea, without using any of the specifics of the photos, there there would be no infringement. If the photos were instead images of an imaginary thing, perhaps a dragon, or some invented machine of building perhaps, with the images created by perhaps a compute animation program, or by photographing a model, the legal rules would be the same. If the painter simply used the idea from the photos, there is no infringement. If the painter used sufficient specific detail so that the painting is a derivative work, then permission is required. Exactly how much detail must be used for a work to be considered &quot;derivative&quot; is a matter of judgement -- ultimately the judgement of a court if the matter is disputed. There is no clear bright line making that distinction. That C has commissioned the painter T to create the painting is not relevant, unless C is the copyright owner of the photos, or has secured permission from the copyright owner(s). If C validly grants permission, then there is no copyright issue even if the painting is a derivative work. It does not matter what technique or technical means T uses to create the painting. T may use a brush, a pallet knife, a toy car, drips of paint, or a compute drafting program. If, by whatever means, T creates a derivative work, then permission is needed or else it is an act of infringement merely to create the work. If the work is not derivative, then no permission is needed. Copyright law applies no matter what specific technique the creator of an image uses, provided that human creativity is involved.
One big hole in any scheme that relies on copyright is that it could not preclude people talking about the previous content or talking about you. This is well established First Amendment law. For example, see Near v. Minnesota 283 U.S. 697 (1931), which holds that except in rare judicially established exceptions (relating to military information, obscenity, and inciting acts of violence), government censorship is unconstitutional. Thus, no statutory scheme could be used to prevent third parties who happened to have seen the material while it was freely available from re-iterating what they had seen, or talking about it, or talking about the author (you). People could even reproduce portions of the published content. Some types of reproduction would be protected as fair use in the US, especially if the reproduction is for the purpose of criticism. (17 USC 107, and this previous Law.SE answer) The closest approach would be to protect your work as trade secret, making sure that anyone that you share it with agrees to non-disclosure. But, if you "publish unique content under this pseudonym" there is no way to "arbitrarily or wholly revoke discussion about that content". If the cat gets out of the bag, while you may have remedies against the person who violated the non-disclosure agreement, you would not be able to prevent third-party discussion or reproduction.
The mall is a privately owned public space At least while it’s open to the public. A photograph of architecture taken from within it would not violate copyright. However, photographs of other things (like art) do not have the public space exemption. Additionally, the owner can limit or restrict photography. This has nothing to do with copyright, just that an owner has the right to control what happens on their property (within legal limits).
20th Century Fox have a trademark on "Simpsons." They have trademarks on "Bart Simpson", on "D'oh", on "Duff Beer". I would assume that they take their trademarks seriously. What you can't do is to use someone else's trademark to make people believe your commercial product is related to theirs. It's quite reasonable to assume that someone seeing your book in a store would think it is written by the makers of The Simpsons show and therefore buy it. Even if you say that isn't your intention, it is what would happen. I'd try coming up with some different titles, maybe "How to write animated TV shows" with "Example: The Simpsons" (well, you are the writer so you should come up with something better), and take them to a lawyer. And then contact the makers of the show (again asking the lawyer for advice how to do this) because even if your lawyer says the title is fine, that doesn't mean you can't be sued.
Yes The US constitution is in the public domain. Anyone may publish a version of it, including an altered version. No US law forbidding publication of an altered version would itself be constitutional -- the First Amendment would prevent such a law. However, if an altered version were sold under such conditions that a customer might reasonably believe it to be an unaltered version, that might be false advertising, or perhaps fraud, because the seller would be deceiving the customer as to what the product is.
I gather that the numerous ramifications you outline are merely contexts and that your main concern is about the application of contract law (contract law in the U.S. does not really vary among states). Thus, I will not really delve in the intricacies of --for instance-- privacy or copyright issues arising from the commercial use of a person's likeness that you mention in one of the scenarios. As a starting point, one needs to bear in mind that: a contract is an exchange of considerations under terms and conditions entered knowingly and willfully by the parties, which can be evidenced by the parties' subsequent conduct (that is, not just by signing a document); and a contract is unenforceable if it contravenes public policy and/or the covenant of good faith and fair dealing. Accordingly, the questions are (1) whether a person knew or reasonably should have known about the terms &amp; conditions at or by the time of those events which trigger obligations pursuant to the contract; and (2) whether the provisions therein are unreasonable, illegal, or tantamount to a penalty, especially in the event that the party breaches or repudiates the alleged contract (see the Restatement (Second) of Contracts at § 356(2)). The scenario of house for sale entails various difficulties as per contract law and otherwise. Here are some of those issues: Are visitors properly (including "beforehand") notified about the "walkway clause"? If not, the contract is void because it cannot be said that visitors knew about &amp; accepted that condition. Does the house provide alternatives for lawful &amp; informed visitors to safely avoid the walkway? If not, then the seller/owner might end up incurring premises liability with respect to those visitors who get injured in making their reasonable effort not to trigger the "walkway clause". Is the house owner realistically able to prove that use of the walkway by lawful &amp; informed visitors is sufficiently "inconsistent with the offeror's ownership of offered property" so that triggering a house sale is a reasonable consequence (see Restatement at §69(2))? Is the owner-imposed mortgage rate compliant with state law pertaining to granting of credit &amp; loans? These exemplify only some of the burdensome complications when trying to enforce "contracts" which are extravagant or quite one-sided. Lastly, as a side note, the presumption that a person reading the poster and walking in the intended area does not thereby receive consideration is not necessarily accurate. As an example, the "intended area" could have been devised by an entity in the business of enjoyment and recreation, such as a private park. The person who deliberately walks in (regardless of whether he read the poster) certainly receives a consideration, which is the amusement or recreation for which the park was designed.