Ellipticity

Definition and stakes

Portrait of Mary Everest Boole Mary Everest Boole,  Logic Taught by Love (1905)

“ And some clever young lecturer, who happens to have heard that our solar system, as a whole, is in motion, and who fancies that such knowledge is his own peculiar property, triumphantly asserts that the earth-path is not an ellipse, but an elliptical spiral; and that any statement based on the premise that the ellipse represents a planet-path must be false throughout. Now what chance would any of us have of teaching anything to a class subject to such interruptions of the normal current of thought? ”
Source: Wikisource

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