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Ideas for 'On the Question of Absolute Undecidability', 'Presupposition' and 'Objects and Persons'

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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not

19052	Natural language 'not' doesn't apply to sentences [Dummett]
	Full Idea: Natural language does not possess a sentential negation-operator.
	From: Michael Dummett (Presupposition [1960], p.27)
	A reaction: This is a criticism of Strawson, who criticises logic for not following natural language, but does it himself with negation. In the question of how language and logic connect, this idea seems important. Term Logic aims to get closer to natural language.

5. Theory of Logic / K. Features of Logics / 5. Incompleteness

17894	We have no argument to show a statement is absolutely undecidable [Koellner]
	Full Idea: There is at present no solid argument to the effect that a given statement is absolutely undecidable.
	From: Peter Koellner (On the Question of Absolute Undecidability [2006], 5.3)