If I need to emphasise the point, earlier today I told him quite clearly that the stone ceases to be visible 4 kms away. He then goes on to tell you that he does'nt know. I think that shows how much he values the opinion of others, and the attention he pays to what he is told. In most resects I value his opinion. He is clearly an educated and dedicated man. But taking a contrary stance just to prove he knows more than everyone is helpful to no one.