chevron deference. here is the problem. and it's a major problem. all of these cannons depend on a problematic threshold question. courts may resort to the cannons only if the statute is not clear, but rather is ambiguous. but how do courts know when a statute is clear or ambiguous? in other words, how much clarity is sufficient to call a statute clear and to end the case there without triggering the ambiguity-dependent cannons? unfortunately, there is often no good or predictable way for judges to determine whether statutory text contains enough ambiguity to cross the line where courts may resort to the constitutional voidance doctrine, legislative history, chevron deference. in my experience, and this is my personal experience, judges often go back and forth arguing over this exact point. one judge will say the statute is clear. that's the end of it. the other judge will respond, i think the text is ambiguous, manying one or another should avoid the case. neither judge can convince the other. and that'