“Light signals alone provide the metrical structure of the four-dimensional space-time continuum. The construction may be called light axioms.”

The Philosophy of Space and Time (1928, tr. 1957)

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Hans Reichenbach 41
American philosopher 1891–1953

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“We often resort to something called Hilbert space, which is described as n-dimensional—it’s like modern sex, any number may be played with.”

Source: The Quincunx of Time (1973), Chapter 10, “Weinbaum on Sinai” (p. 116)

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