Logician

Georg Wilhelm Friedrich Hegel

Philosophy

Idealism

1770–1831

"It strikes everyone in beginning to form an acquaintance with the treasures of Indian literature, that a land so rich in intellectual products and those of the profoundest order of thought...""

🇦🇹Ludwig Wittgenstein

Philosophy

analytic philosophy

1845–1925

"What is the case, the fact, is the existence of atomic facts."

🇬🇧Alfred North Whitehead

Philosophy

1861–1947

"Familiar things happen, and mankind does not bother about them. It requires a very unusual mind to undertake the analysis of the obvious."

Rudolf Carnap

Philosophy

Positivism

1891–1970

"A decisive difference between our method and Frege's consists in the fact that our concepts, in distinction to Frege's, are independent of the context."

🇨🇭Jean Piaget

Philosophy

1896–1980

"The essential functions of the mind consist in understanding and in inventing, in other words, in building up structures by structuring reality."

🇺🇸Charles Sanders Peirce

Mathematics

pragmatism

1839–1914

"Let us not pretend to doubt in philosophy what we do not doubt in our hearts."

William Stanley Jevons

Economics

1835–1882

"Capital simply allows us to expend labour in advance."

🇺🇸Lewis Carroll

Literature

1845–1907

"Alice had got so much into the way of expecting nothing but out-of-the-way things to happen, that it seemed quite dull and stupid for life to go on in the common way."

Richard Whately

Religion

1787–1863

"Weak arguments are often thrust before my path; but although they are most unsubstantial, it is not easy to destroy them. There is not a more difficult feat known than to cut through a cushion with a sword."

Gerald Massey

Literature

1828–1907

"The kingliest kings are crowned with thorn."

Augustus De Morgan

Mathematics

1806–1871

"A Budget of Paradoxes reprinted, with the author's additions from the Athenæum journal"

🇬🇧William of Ockham

Religion

scholasticism

1287–1347

"Purely philosophical assertions which do not pertain to theology should not be solemnly condemned or forbidden by anyone, because in connection with such anyone at all ought to be free to say freely what pleases him."

🇺🇸Saul Kripke

Philosophy

1940–2022

"It really is a nice theory. The only defect I think it has is probably common to all philosophical theories. It's wrong."

Peter Abelard

Religion

Classical period

1079–1142

"Q3 Is there any knowledge of things unseen, or not?"

🇩🇪Gottfried Leibniz

Mathematics

rationalism

1646–1716

"Although the whole of this life were said to be nothing but a dream and the physical world nothing but a phantasm, I should call this dream or phantasm real enough, if, using reason well, we were never deceived by it."

David Hilbert

Mathematics

1862–1943

"Every kind of science, if it has only reached a certain degree of maturity, automatically becomes a part of mathematics."