Talk:Rudolf Carnap

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I did not known that Einstein was a teacher of Carnap. Can anyone give me a reference? Thanks. [[Murzim 12:35, 15 March 2006 (UTC)]]

I never read anywhere that Einstein was a "teacher" of Carnap except in the sense that he was an influence. Carnap replied to Hempel's attack on the analytic-synthetic distinction both in Schilpp’s Albert Einstein: Philosopher-Scientist (1949) containing Hempel's critique and in the concluding two chapters of his Philosophical Foundations of Physics (1963) where Carnap references Einstein's Sidelights on Relativity (1921; English, 1923), in which Einstein says that the theorems of mathematics are certain in so far as they are not about reality, and that in so far as they are about reality they are uncertain. Carnap maintained that the analytic-synthetic distinction is of supreme importance for philosophy of science. Carnap believed that Einstein's theory of relativity could not have been developed had Einstein not recognized the sharp dividing line between pure mathematics, in which there are many logically consistent geometries, and physics, in which only experiment and observation can determine which of these mathematical geometries can be applied most usefully to the physical world. This reply made late in Carnap’s career reveals how influential Einstein’s development of relativity theory was on Carnap’s philosophical thinking. See my History of Twentieth-Century Philosophy of Science, BOOK III: Carnap - with free downloads with permission for nonprofit use. Thickey3 14:28, 7 May 2007 (UTC)Thomas J. Hickey

His views on religion[edit]

I don't think that the Category: American atheists, and metaphysicians are good to determine his views. I think that he wasn't an atheist, because he said, that the word God has lost its meaning when people transfer it to a metaphysical conception. He called metaphysical terms "meaningless". But I think that he was atheist toward the Greek gods or others. We can't deny a meaningless term.

"Carnap was an atheist" According to his friend and former student, he was.


Is the esperanto tidbit really relevant? There's nothing else that trivial on the page. I wonder if the esperanto people have been by... 02:58, 1 October 2007 (UTC)

Wikipedia conveys information. The mention of Carnap's interest in Esperanto is informative.Lestrade (talk) 14:09, 30 January 2008 (UTC)Lestrade

"In 1921, Carnap wrote a letter to Bertrand Russell, who responded by copying out by hand long passages from his Principia Mathematica for Carnap's benefit, as neither Carnap nor Freiburg could afford a copy of this epochal work." This passage is a bit trivial and dubious. According to Russell’s biography this was a very busy year. Also the lack of financial means on the part of Carnap appears somewhat dubious. —Preceding unsigned comment added by Froemmcke (talkcontribs) 00:35, 10 March 2010 (UTC)

there is no problem with the mentioned passage. all of the contents in the mentioned passage explicitly appears in Carnap's autobiography(which I cannot find any link at this moment). the lack of financial means was caused by the hyperinflation in Germany of 1930s.

add photo[edit]

Carnap was a leader of the logical positivist movement for lack of a better name for it. It would be nice to have a picture of the man. How about (talk) 07:39, 10 October 2011 (UTC)


This is a Carnap concept, is it not? Does it mean "reminder of similarity"? Many thanks, (talk) 12:29, 6 August 2012 (UTC)

It means "memory (or recollection) of similarity." It's the first relation defined on the "elementary experiences" in the Aufbau,section 78. The English translation by R.A. George has "recollection of similarity." — Preceding unsigned comment added by TFOTS (talkcontribs) 01:51, 28 August 2016 (UTC)

Rudolf or Rudolph?[edit]

The article gives his first name as Rudolf, which I am sure is correct. There is a redirect from the spelling Rudolph, which is used by several other articles. Is there any reliable source for this as a legitimate variant, or is it just a mistake? SamuelTheGhost (talk) 11:10, 10 October 2012 (UTC)
I've now changed most of the links from other articles. The only "reliable" source for the Rudolph spelling seems to be his FBI file. SamuelTheGhost (talk) 13:38, 10 October 2012 (UTC)

German born?[edit]

What does 'German born' mean? Why not simply 'German'. There's nothing in the article to qualify the use of 'German born'. — Preceding unsigned comment added by (talk) 04:57, 3 March 2013 (UTC)