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Sense/useful/useless/Wittgenstein: when it make sense to say: "There are four primary colors", it must also make sense to say: "There are five primary colors." See also II 113, II 167, II 372.
Sense/Fraud/error/Wittgenstein: what allows us to judge the world correctly, also allows us to misjudge it.
Sense/nonsense/useful/useless/Wittgenstein: E.g "This sound is red" is not wrong, but nonsense - to name something a color is to say that it obeys certain grammatical rules - limit: I cannot say, sounds would have properties that do not belong to the colors, because then I would have to say sensibly that colors have properties that they do not have. - ((s) I would have to be able to deny it.) - E.g. "colors are not loud". - Sense and nonsense have nothing in common- meaningless word combinations are not part of the language - grammar sets the limit.
Sense/Wittgenstein. We can talk of "sense" without giving the expression a clear meaning.
Rule/sense/Wittgenstein: E.g. the command "replace seven by zero" makes no sense, except that it specifies a rule. - ((s) rules do not need to give sense beyond that).
Proof/sense/Wittgenstein: nonsense: to say, only the evidence gives the question a sense. - Correct: the evidence provides a possibility to respond. - With that it gives the question a sense. - ((s) Third, intermediate instance.)
Sense/Show/Tell/Tractatus/Wittgenstein/Flor: the phrase is used, to express the idea - on the other hand, the sense can only be specified by specifying the truth conditions or repeating the sentence.
Sense/Tractatus/Tetens: controversial thesis: that only descriptive sentences made sense. - Ethics: Problem: normative statements are meaningless.
Definition sense of the sentence/Tractatus: (4.2:) His agreement and disagreement with the possibilities of the existence and non-existence of facts.
Hintikka: it follows that the identity of the meaning of two expressions cannot be claimed linguistically. (Tractatus 6.2322).
Picture Theory/image theory/Tractatus/Wittgenstein/Hintikka: names are points, sentences, arrows, they have sense. The sense is determined by the two poles of true and false.
Vorlesungen 1930-35 Frankfurt 1989
Das Blaue Buch - Eine Philosophische Betrachtung Frankfurt 1984
Tractatus Logico Philosophicus Frankfurt/M 1960