I gave a friend some health advice. Then she discussed her problem with another friend. Later she told me that she’d been given very different advice by this mutual friend. In theory the other friend was slightly more knowledgeable on this subject than I am.
She was obviously uncertain what to do. I told her to look at him and look at me and decide who was healthier.
I told her: “Don’t take health advice from unhealthy people.”
She laughed and said: “In that case it’s clear whose advice I should follow.”