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Wittgenstein's N-operator is a broader infinitary analogue of the Sheffer stroke, which applied to a set of propositions produces a proposition that is equivalent to the denial of every member of that set. Wittgenstein shows that this operator can cope with the whole of predicate logic with identity, defining the quantifiers at 5.52, and ...
The picture theory of language, also known as the picture theory of meaning, is a theory of linguistic reference and meaning articulated by Ludwig Wittgenstein in the Tractatus Logico-Philosophicus. Wittgenstein suggested that a meaningful proposition pictured a state of affairs or atomic fact.
In philosophy, Wittgenstein's ladder is a metaphor set out by Ludwig Wittgenstein about learning. In what may be a deliberate reference to Søren Kierkegaard's Concluding Unscientific Postscript to Philosophical Fragments, [1] [2] the penultimate proposition of the Tractatus Logico-Philosophicus (translated from the original German) reads: 6.54
The logical status of these propositions in Wittgenstein's investigation, including their relation to physics, was discussed in detail in Jonathan Westphal's Colour: a Philosophical Introduction (1991). There seem to be propositions that have the character of experiential propositions, but whose truth is for me unassailable . . .
Ludwig Josef Johann Wittgenstein (/ ˈ v ɪ t ɡ ən ʃ t aɪ n,-s t aɪ n / VIT-gən-s(h)tyne, [7] Austrian German: [ˈluːdvɪk ˈjoːsɛf ˈjoːhan ˈvɪtɡn̩ʃtaɪn]; 26 April 1889 – 29 April 1951) was an Austrian philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.
In Wittgenstein's theory, an atomic complex is a layered proposition subsuming many atomic propositions, each representing its own state of affairs. Wittgenstein's handling of belief was dismissive and reflects his abstention from the epistemology that concerned Russell.
Wittgenstein's initial conception of mathematics was logicist and even formalist. [1] The Tractatus described the propositions of logic as a series of tautologies derived from syntactic manipulation, and without the pictorial force of elementary propositions depicting states of affairs obtaining in the world.
On Certainty (German: Über Gewissheit, original spelling Über Gewißheit) is a philosophical book composed from notes written by Ludwig Wittgenstein over four separate periods in the eighteen months before his death on 29 April 1951.