Every word or concept, clear as it may seem to be, has only a limited range of applicability.
Werner Heisenberg
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The solution of the difficulty is that the two mental pictures which experiment lead us to form - the one of the particles, the other of the waves - are both incomplete and have only the validity of analogies which are accurate only in limiting cases.
- Werner Heisenberg -
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What we observe is not nature itself, but nature exposed to our method of questioning.
- Werner Heisenberg -