I am just as sceptical of the naïve idealist view, espoused by some post-modernists, that reality is all in our heads – we make it all up. For one thing there would be no point in my writing this, since you don't exist to read it. I take it that we bring about a world in consciousness that is partly what is given, and partly what we bring, somethin

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If one had to characterise the difference overall, is something like this. Experience is forever in motion, ramifying and unpredictable. In order for us to know anything at all, that thing must have enduring properties. If all things flow and one can never step into the same river twice– Heraclitus’s phrase is, I believe, a brilliant evocation of t

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