“The word hypothesis has now a somewhat different significance from that given it by Newton. We are now accustomed to understand by hypothesis all thoughts connected with the phenomena.
Newton was far from the crude thought that explanation of phenomena could be attained by abstraction.”

—  Bernhard Riemann

Causality
Gesammelte Mathematische Werke (1876)

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Bernhard Riemann 43
German mathematician 1826–1866

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