That's entirely true. And I for one, know that if I was confronted by LEO about a knife that can be opened by a flick of the finger, according to Idmaster, I wouldn't be in a position to challenge his stance, and I wouldn't try. He'd be quoting case law to me, and I would be none the wiser. It would be much simpler to me to just surrender my knife, pay the citation and be on with my life. He had it right on, but the only difference in his words that I saw were "flick of a finger" vs. "flick of a button", so I guess I was thinking through my fingers, and wondering if that would open up some ground in the case of a knife like mine.
So, hypothetically, if I was confronted and had my knife confiscated and I was cited because it could be opened with the flick of a finger, but if the statute says "flick of a button", would I be let off the hook, or would the case be thrown out? I wouldn't be interested in disputing what an officer said, especially during the confrontation itself, due to his having a badge and all. But it helps to know, especially if I carry it daily.