On 28/02/2017 12:01, RussellMc wrote: > * Immediately resonated the part of my brain containing: > All models are wrong. > Some models are useful > > George Box. This is because all generalisations are wrong :-) Nicola * * --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .