"If somebody had told me in the 1980s that Gerry Adams would shake hands with Ian Paisley or Peter Robinson I would have said put that man in a white suit and lock him up in a padded cell."

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The cells and fibers of the brain must carry some kind of individual identification tags, presumably cytochemical in nature, by which they are distinguished one from another almost, in many regions, to the level of the single neurons.

— Roger Wolcott Sperry