Hi. Yes, I'd read this earlier. Again, I'll opt for the dye test over hearsay. Just my personal preference. The only impressive part of this passage to me is the claim that "the stone" are 90% cholesterol. But this is hearsay and the quote doesn't mention what exactly was tested and how much of it was tested and how different many cases were tested and under what circumstances. We are supposed to accept all this on authority, of course. The rest of the passage is of the sort "it has to be true because I believe x, y, and z are true." The color test will tell and can be done by anyone.