> "Owning" something doesn't mean you have unlimited rights to do what you want with it. Do you not "own" physical books because you can't (legally) photocopy them? Do you not own a gun because you can't (legally, at least where I live) lend it to a friend?

In your examples, you own the book and the gun because the publisher of the book and the manufacturer of the gun (or anyone else, excepting the state, I suppose) can’t unilaterally take them back from you or modify them without some sort of penalty. This can — and has [0] — happened with eBooks. The “unlimited rights to do what you want with [them]” are not guaranteed by ownership in my opinion.

[0] https://www.nytimes.com/2009/07/18/technology/companies/18am...