That's a logical fallacy. Just because he was wrong once doesn't make him wrong on all/more accounts. Inversely, just because he wasn't shown to be wrong, doesn't mean he actually wasn't. That's why this is about looking at the preponderence of evidence, which is beyond the point of being refuted at this point. There is no evidence of the pieces sold by WC having been carved out by hand in their entirety. And that's the end of that.