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When knowledge is ours at the tap of a key, what is it we’re accumulating, and is it at the expense of another, more intuitive, kind of knowing? The word ‘fool’ derives from the Latin follis, one of whose meanings is ‘empty-headed person’. We can’t imagine such mindlessness but might it be possible that by ‘unknowing’ a thing we can start to see it properly? There’s a lot the fool doesn’t know – otherwise they wouldn’t be a fool. But can anyone be trusted to know anything? What can we be tr...