As I understand things, the legal theory is: Everything is copyright infringement. If I download an MP3 to my computer, the act of copying it to my hard disk i

As I understand things, the legal theory is: Everything is copyright infringement. If I download an MP3 to my computer, the act of copying it to my hard disk is making a copy. The act of playing it copies it from my hard disk to RAM, then from RAM to the audio output; these are also copies. That means you either need: A license (e.g. terms and conditions when you buy a legal MP3) or an "implied license" (this is what makes it legal to play CDs) or a right explicitly conferred by law (e.g. 17 U.S. Code § 117(a) lets you copy computer programs into RAM to run them) or a right of "fair use" (which allows e.g. Google copy web pages into their index) So I'm afraid you've infringed copyright countless times - if you run several thousand epochs of training, you've infringed copyright several thousand times. You may note that this is completely at odds with reality, and says almost nothing can happen without a copyright lawyer's permission. A cynic would say this suits the interests of copyright lawyers, if not reality, and nobody else gets to create legal theories about copyright infringement.