To break it down (and I think the 9th Circuit will agree--but is it really such a good thing to be on the same legal page as California?), we have to follow the "decis" of previous court decisions. We arrive at that "decis" through the "ratio" of other courts in rendering their "decideni." That is what that 9th Circuit blurb is saying. The Principle of Stare Decis is a part of our system of Common Law and a fundamental part of the 10th Amendment. We don't just randomly assign decisions though. The Stare Decis is the sum total of Rationes Decidendi from other courts.
The quote is simply stating that Stare Decis can change with time as laws are developed and that we don't base all decisions going forward on all decisions (rationes decidendi) from the past.
The quote is simply stating that Stare Decis can change with time as laws are developed and that we don't base all decisions going forward on all decisions (rationes decidendi) from the past.
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