I am following the hon. and learned Gentleman's argument very carefully, but I think it is fallacious. Surely all these prices have, to a great extent, to be based upon estimates. The hon. and learned Gentleman is particularly concerned in his county with beef. Surely there are a hundred and one estimates of the different prices of beef production, and I should have thought that if his argument were sound it would never have been possible to have arrived at a guaranteed price for beef. Surely there must be some estimating.