Laweyers tend go on "the safer side" so to include the most broad definition of "derivative". (As in general: the most pessimistic interpretation of any undersp

Laweyers tend go on "the safer side" so to include the most broad definition of "derivative". (As in general: the most pessimistic interpretation of any underspecified clause.) For example, in principle a screenshot would be a perfect example of a "fair use" for citation/reference. In practice, lwayers tend to disagtee - as "a small part of a work" is something horribly unspecified. Of course, if you are Google/Facebook/Apple or so, you can do as you wish. (Unless you are at risk of a legal war with another corporation.) So because they use it in a given way does not mean that you will be able to defend yourself the same way.