Within a machine this little bit whizzes around that way and interacts with this other one to trigger that flip there which......produces the outcome of the machine. To work out what the machine does, how wellTim 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. ...