I searched the thread for "zero-knowledge" and I can't find anyone having said anything like that before your above comment, and I can also see you jumping from

I searched the thread for "zero-knowledge" and I can't find anyone having said anything like that before your above comment, and I can also see you jumping from "structure" to "knowledge" in the span of two comments, so I really think you are shifting the goal posts. More to the point, I don't think there were any goal posts at any point and you are simply prepared to make up new conditions for as long as it suits you. So, my apologies, but I must decline to share any pointers to systems or techniques etc. You seem to have made up your mind before you even see what I'm talking about, anyway.