We are drawn, involuntarily and inexorably, to prominent, fully formed, incontrovertibly heaped conclusions. With potentially disastrous consequences. The world of our ancestors may well have been black and white. But the colour of now is grey. We draw lines to create contrast because it is through the stark juxtaposition of contrast that we see. But the greater the contrast, the lesser the finer-grained detail. And the lesser the detail, the greater the potential for ignorance and errors