Anticipation and obviousness naturally have quite a bit in common. You frequently see the defenses listed in the alternative like, "the Velma reference anticipates the '666 Patent, or, in the alternative, The Velma reference in combination with the Daphne, Fred, and Shaggy references renders the '666 patent obvious." Indeed, you see this so commonly, that you might wonder if it's even necessary to specifically include the anticipation argument in your contentions/ expert reports/ pretrial order/ etc., since more or less all of it will be included in the obviousness case.
The answer is yes, you do have to include it. It is, in fact, very bad if you don't.
The defendant in BioDelivery Scis. …