Indeed, obvious, once you know about it the neural networks hook up nicely; kinda like using a kitchen breadmaking machine and a paint stripper for roasting coffee beans. But consider the size of the leap; car headlights vs soldering. Is the size of the leap always the same, or are some leaps much larger? What else is unknown? Is there a quantum of our ignorance, or is it a continuum? --=20 James Cameron http://quozl.netrek.org/ --=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 .