[codedokode]

The law makes a distinction between storing it on a disk and just remembering the content. The latter is not a "copy" and not a subject of law:

> “Copies” are material objects, other than phonorecords, in which a work is fixed by any method now known or later developed, and from which the work can be perceived, reproduced, or otherwise communicated, either directly or with the aid of a machine or device. The term “copies” includes the material object, other than a phonorecord, in which the work is first fixed.

> A work is “fixed” in a tangible medium of expression when its embodiment in a copy or phonorecord, by or under the authority of the author, is sufficiently permanent or stable to permit it to be perceived, reproduced, or otherwise communicated for a period of more than transitory duration. A work consisting of sounds, images, or both, that are being transmitted, is “fixed” for purposes of this title if a fixation of the work is being made simultaneously with its transmission.

https://www.copyright.gov/title17/92chap1.html

[threethirtytwo]

Interesting. How long is the transitory duration? The interpretation of that likely has yet to be determined by a court case and can evolve similar to how “all men are created equal” doesn’t just refer to men.

Seems to me a possible interpretation is just deleting the data after training is finished.