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In philosophy, used to denote something known from experience. a priori: from the former: Presupposed independent of experience; the reverse of a posteriori. Used in mathematics and logic to denote something that is known or postulated before a proof has been carried out. In philosophy, used to denote something is supposed without empirical ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 September 2024. Discrepancy between lack of evidence of advanced alien life and apparently high likelihood it exists This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is ...
Every dog has his day [a] Every Jack has his Jill [a] Every little bit helps [a] Every man for himself (and the Devil take the hindmost) [a] Every man has his price [a] Every picture tells a story [a] Every stick has two ends [a] Everybody wants to go to heaven but nobody wants to die [a] Everyone has their price.
In the puzzle the question is unknown, but the answer is already known to be 42. This is similar to the book where the "Answer to the Ultimate Question of Life, the Universe, and Everything" is known but not the question. The puzzle first appeared in The Illustrated Hitchhiker's Guide to the Galaxy. It was later incorporated into the covers of ...
Solipsism (/ ˈ s ɒ l ɪ p s ɪ z əm / ⓘ SOLL-ip-siz-əm; from Latin solus 'alone' and ipse 'self') [1] is the philosophical idea that only one's mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure; the external world and other minds cannot be known and might not exist outside the mind.
All that glitters is not gold" is an aphorism stating that not everything that looks precious or true turns out to be so. While early expressions of the idea are known from at least the 12th–13th century, the current saying is derived from a 16th-century line by William Shakespeare , " All that glisters is not gold ".
Fermat's principle, also known as the principle of least time, is the link between ray optics and wave optics. Fermat's principle states that the path taken by a ray between two given points is the path that can be traveled in the least time. First proposed by the French mathematician Pierre de Fermat in 1662, as a means of explaining the ...
The unexamined life is not worth living" is a famous dictum supposedly uttered by Socrates at his trial for impiety and corrupting youth, for which he was subsequently sentenced to death. The dictum is recorded in Plato's Apology (38a5–6) as ho dè anexétastos bíos ou biōtòs anthrṓpōi ( ὁ δὲ ἀνεξέταστος βίος οὐ ...