What precise legal consideration dictates whether an image found on the internet can be used on Wikipedia, even if the uploader claims it is 'free to use'?

The precise legal consideration that dictates whether an image found on the internet can be used on Wikipedia, even if the uploader claims it is 'free to use', is whether the image's copyright holder has explicitly granted a license that is compatible with Wikipedia's licensing requirements. Copyright law protects the creators of original works, including images, giving them exclusive rights to control how their work is used. Simply finding an image online or having an uploader claim it is 'free to use' does *notautomatically mean it can be used on Wikipedia. Wikipedia primarily uses content licensed under Creative Commons licenses (specifically, CC BY-SA) or that is in the public domain. These licenses allow others to use, modify, and distribute the work, even for commercial purposes, as long as they attribute the original creator and license their derivative works under the same terms. To use an image on Wikipedia, it must be clear that the copyright holder has explicitly granted a license that allows these uses. This typically involves the copyright holder stating the specific license under which the image is released. Without such a license, or if the license is unclear or incompatible with Wikipedia's requirements, the image cannot be used, regardless of the uploader's claims.