To work out what a machine does - and how well it does it - it's necessary to grasp more than just a little bit of what the machine is doing internally. This is as trueTim Worstall is a wholesaler of rare earth metals and one of the global experts in the metal scandium. He is also a Fellow at the Adam Smith Inst in London and an writer for a number of media outlets, including The Times (London), Telegraph, The Register and even, very occasionally indeed, for the WSJ. This account is linked with that of Moha ...