How Do You Test That Something Doesn't Work?

I do not wanto caught risks, but, you know, try something a little bit different. I often tell my clients that we build and rank our own sights. There's nothing comforting they get from knowing that. So i'd never shy away from telling them. But it's never come up on the how did you learn that this doesn't work? It's just aoi, it becomes us, like yoube doing the six years ick.