“A given phenomenon, today considered random, may tomorrow be considered determined because its causes will have been unraveled by thorough and specific study.”

— Pierre-Paul Grassé

Grassé, Pierre Paul (1977); Evolution of living organisms: evidence for a new theory of transformation. Academic Press, p. 279
Evolution of living organisms: evidence for a new theory of transformation (1977)
Context: Exceptional, unforeseeable, or even inexplicable phenomena would hence be fortuitous. these very vague adjectives too often have a merely circumstancial meaning. A given phenomenon, today considered random, may tomorrow be considered determined because its causes will have been unraveled by thorough and specific study.
Biologists, whose task is not to seek moral causes or intentions, must first of all make sure that so-called random facts really are random facts; they must constantly keep in mind Poincare's (1912b, p. 65) famous phrase: "Chance is only the measure of our ignorance."

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Pierre-Paul Grassé12

French zoologist 1895–1985

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