It is customary in scientific writing to state the important points just as often as the unimportant ones; exactly once; and to assume thereafter that this vital information is graven in the minds of all readers. This is one of the wonders of science, for it is economical of space in journals and it encourages researchers to write up their findings. It also ensures a certain permanence to the work, for it will be years before it is completely understood. -- J. D. Williams, The Compleat Strategyst