Kubrick Defence, which is, of course, not called the Clarke defense, since it's design that we're talking about here. In other words, it's the visuals in the film, and not the description in the book that has been cited. Nevertheless, the very fact that it was raised creates an interesting hornet's nest about the 'hypothesis', industrial design, and artistic conception and the interrelationship between them, particularly from a legal point of view. As an author, I'll be watching the ongoing outcome with interest, and thinking about the power of art in new ways.
ps: I loved 2001 - one of the very few instances where I felt the film was better than the book.