How do you know the flush cannot remove big gallstones?
How do you know they can? Being that so many of the so-called "stones are much larger than the ducts can possibly expand this is pretty solid evidence. On top of that lab analyses have proven that what people are passing ARE NOT real gallstones. They are saponified olive oil and sterol-cholesterol complexes. This also explains why their shape, texture, color, etc. are not consistent with real gallstones.