That's exactly what he seays. I attended a seminar of his last year and his approach was very confronting. It made us rethink what we have always hung our hat on - the validity of our provings. He continues to say that they are not valid and that they all need to be redone as they are not accurate as they were only proved by a handful of provers. This is why he uses the doctrine of signatures and immense research. I'm not sure if you are familiar with his books but they are very deep and intense in their scientific validity. A must for every homeopath in my opinion.