|Logical constants: logical constants are also called logical particles or connectives, they are e.g. “and”; “or”; “if”; “then”; “not”. The expression constant is used, because the meaning of the logical links cannot change also in the translation into other languages, but always remains. For example, if one was to try to replace "and" with "or" in the case of a translation, mistakes would arise which could be determined, even if the vocabulary of the foreign language is not entirely known.|
Books on Amazon
Sheffer stroke/notation/Wittgenstein: makes the internal relation visible. - WittgensteinVsRussell: his writing style does not make clear that p v q follows from p.q.
Logical constants/elementary proposition/WittgensteinVsTractatus/WittgensteinVsWittgenstein/Schulte:
new: priority of a sentence-system compared to single sentences - formerly VsLogical constants - (do not connect any objects, this is still true for Wittgenstein) - but wrong: that the rules have anything to do with the internal structure of sentences. - New: they form part of a broader syntax.
Vorlesungen 1930-35 Frankfurt 1989
Das Blaue Buch - Eine Philosophische Betrachtung Frankfurt 1984
Tractatus Logico Philosophicus Frankfurt/M 1960