In reference and in context to the quote in the original post. Don't play these semantical games with me - I'm way ahead of you.
Are you serious?
I'm citing to you from the dadgum opinion. That's what Breyer said; you said he didn't mention the common law, but my God, there it is in the opinion, as plain as the nose on your face. I'm sorry that the original poster didn't bother to read or comprehend it. You're even worse: you read it, and then yet still act obtuse.
Look, this issue is just undeniable. There is 400 years of history backing up the knock and announce rule. It's part of the Constitution. Breyer thinks so, Scalia thinks so, Thomas thinks so. Really, there is pretty much no one anywhere that has any knowledge of Anglo-American law that thinks it's not a right.