We come now to the question what is a priori certain or necessary, respectively in geometry (doctrine of space) or its foundations Formerly we thought everything nowadays we think nothing. Already the distance-concept is logically arbitrary there need be no things that correspond to it, even approximately. (Albert Einstein)

We come now to the question what is a priori certain or necessary, respectively in geometry (doctrine of space) or its foundations Formerly we thought everything nowadays we think nothing. Already the distance-concept is logically arbitrary there need be no things that correspond to it, even approximately.

Albert Einstein

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arbitrary certain doctrine everything geometry necessary need nothing now nowadays question space thought think things

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