Patents (software or not) must non-obvious as well: "A patent may not be obtained though the invention ... if the differences between the subject matter sought

Patents (software or not) must non-obvious as well: "A patent may not be obtained though the invention ... if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains." Apple is saying this one is just an obvious application of pre-existing patents.