“The science of probability gives mathematical expression to our ignorance, not to our wisdom.”
Time Considered as a Helix of Semi-Precious Stones (1968)
Context: If everything, everything were known, statistical estimates would be unnecessary. The science of probability gives mathematical expression to our ignorance, not to our wisdom.
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Samuel R. Delany 131
American author, professor and literary critic 1942Related quotes

“Probability fractions arise from our knowledge and from our ignorance.”
Source: The Emergence Of Probability, 1975, Chapter 14, Equipossibility, p. 132.

“The doorstep to the temple of wisdom is a knowledge of our own ignorance.”

“Time is... the expression of our ignorance of the full microstate.”
"Forget time" (Aug, 2008)
“The assumptions and definitions of mathematics and science come from our intuition”
Methods of Mathematics Applied to Calculus, Probability, and Statistics (1985)
Context: The assumptions and definitions of mathematics and science come from our intuition, which is based ultimately on experience. They then get shaped by further experience in using them and are occasionally revised. They are not fixed for all eternity.

cited in: Morris Kline (1969) Mathematics and the physical world. p. 1
Opus Majus, c. 1267
As quoted by Morris Kline, Mathematical Thought from Ancient to Modern Times (1972)

The Richard Dimbleby Lecture: Science, Delusion and the Appetite for Wonder (1996)