And nobody can realistically reproduce anything outside their own little niche. "I injected the boys with fluid from cowpox victims, and they didn't get smallp

And nobody can realistically reproduce anything outside their own little niche. "I injected the boys with fluid from cowpox victims, and they didn't get smallpox later." "I don't believe you" Turtles all the way down. At best we can say the quacks hold everyone else's evidence to a higher standard than their own.