You can't make that blanket statement because some people get similar stones via other protocols that don't include oil and many have continued flushing to the point that stones are no longer produced. For that blanket statement to be true, these same stones would have to be produced every time. I personally went 4 consecutive flushings with NOTHING - not a hint not a speck! Epsom Salts and grapefruit are also irrelevant as they are not always used in this process. I am sure you are not prepared to explain the mechanism of formation or failure to do so.