USPTO are not infallible or immune to mistakes. Either way, we have Objective Indicia in spades. Long felt unresolved need, failure of others to determine a solution to the long felt need, it was developed amongst skepticism , prior art teaches away from the applicants invention( MORI favored DHA), recognition of the problem( Mancu?) copying of the invention by competitors( generics), rather than designing around the invention, may also be considered in the determination of non obviousness. Even better is evidence that competitors have tried to design around the applicants invention without success( pharmaceutical EPA/DHA/DPA combos). The court can also consider other factors against obviousness as well. These aren’t my words and I’m paraphrasing some of it from an article on invention protection from Dawsey intellectual property law. FWIW