the necessary and sufficient conditions for rational knowledge
Source: Great Islamic Encyclopedia website, 2016 https://www.cgie.org.ir/fa/news/154958
“Reason, that which we call reason, reflex and reflective knowledge, the distinguishing mark of man, is a social product.”
The Tragic Sense of Life (1913), II : The Starting-Point
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Miguel de Unamuno 199
19th-20th century Spanish writer and philosopher 1864–1936Related quotes
“Is there any knowledge in the world which is so certain that no reasonable man could doubt it?”
Source: 1910s, The Problems of Philosophy (1912)
Don Alvarez in Act I, Sc. 1; also misquoted as "Reason gains all people by compelling none."
Alzira: A Tragedy (1736)
“There wasn’t even any reasoning. Secrecy was just a bureaucrats’ reflex.”
Source: Embassytown (2011), Chapter 22 (p. 276)
On History.
1820s, Critical and Miscellaneous Essays (1827–1855)
Variant: What is all Knowledge too, but recorded Experience, and a product of History; of which, therefore, Reasoning and Belief, no less than Action and Passion, are essential materials.
Kant's Inaugural Dissertation (1770), Section II On The Distinction Between The Sensible And The Intelligible Generally