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Peirce in 1891
Peirce in 1891
Peirce's birthplace. Now part of Lesley University's Graduate School of Arts and Social Sciences.
Peirce's birthplace. Now part of Lesley University's Graduate School of Arts and Social Sciences.
Peirce in 1859
Peirce in 1859
"The World on a Quincuncial Projection", 1879. Peirce's projection of a sphere onto a square keeps angles true except at four isolated points on the e
"The World on a Quincuncial Projection", 1879. Peirce's projection of a sphere onto a square keeps angles true except at four isolated points on the equator, and has less scale variation than the Mercator projection. It can be tessellated; that is, multiple copies can be joined continuously edge-to-edge.
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Young America's dilemma: Shall I be wise and great, or rich and powerful? (poster from 1901) This is an example of a false dilemma: an informal fallac
Young America's dilemma: Shall I be wise and great, or rich and powerful? (poster from 1901) This is an example of a false dilemma: an informal fallacy using a disjunctive premise that excludes viable alternatives.
Bertrand Russell made various contributions to mathematical logic.
Bertrand Russell made various contributions to mathematical logic.
Image: Aristotle Altemps Inv 8575
Image: Aristotle Altemps Inv 8575
Image: Avicenne   Avicenna   Ibn Sina (980 1037) CIPB2067
Image: Avicenne Avicenna Ibn Sina (980 1037) CIPB2067