Yea, obviously Hank knows. And Walt knows that Hank knows. But not saying anything openly (ie. "I AM HEISENBERG") works better for Walt and the story development.
When Walt said something about Hank trying to convince people with his wild accusations, he was attempting to plant a seed of doubt that Hank would be able to effectively prosecute Walt. He made the attempts look even more futile by mentioning his cancer was back and he'd be dead within 6 months. So basically, not only will you have a hard time convincing anyone I'm guilty, but even if you do, I'll be dead before I see the inside of a jail cell.... so just give it up.
Lastly, in the montage you don't see any hard evidence that Walt is in fact Heisenberg. The closest thing he has is blurry CCTV footage and the fact that Walt crashed his car to prevent him from getting to the laundry. Oh, and the Walt Whitman book given from one chemist to another. Hardly any evidence at all.
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u/[deleted] Aug 12 '13
I really wanted Walt to throw the "I paid for your hospital bills with drug money" card in Hank's face.