id author title date pages extension mime words sentence flesch summary cache txt 37090 Russell, Bertrand Our Knowledge of the External World as a Field for Scientific Method in Philosophy .txt text/plain 72151 2768 60 If we are to avoid non-sensible objects, this must be taken as the whole of our meaning when we say that the blue spectacles are in a certain place, though we have not touched them, and have only seen other things rendered blue by their interposition. It is true that, in order to prolong our lines until they reach this place, we shall have to make use of other things besides the penny, because, so far as experience goes, the penny ceases to present any appearance after we have come so near to it that it touches the eye. cache/37090.txt txt/37090.txt