Combining Philosophers

All the ideas for H.Putnam/P.Oppenheim, Alonzo Church and Peter B. Lewis

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4 ideas

5. Theory of Logic / K. Features of Logics / 7. Decidability

18758	Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee]
	Full Idea: Church showed that logic has a proof procedure, but no decision procedure. If an argument is invalid, there is a model with true premises and false conclusion, but the model will typically be infinite, so there is no way to display it concretely.
	From: report of Alonzo Church (A Note on the entscheidungsproblem [1936]) by Vann McGee - Logical Consequence 5

11. Knowledge Aims / C. Knowing Reality / 3. Idealism / d. Absolute idealism

21912	Fichte, Schelling and Hegel rejected transcendental idealism [Lewis,PB]
	Full Idea: Fichte, Schelling and Hegel were united in their opposition to Kant's Transcendental Idealism.
	From: Peter B. Lewis (Schopenhauer [2012], 3)
	A reaction: That is, they preferred genuine idealism, to the mere idealist attitude Kant felt that we are forced to adopt.

21911	Fichte, Hegel and Schelling developed versions of Absolute Idealism [Lewis,PB]
	Full Idea: At the University of Jena, Fichte, Hegel and Schelling critically developed aspects of Kant's philosophy, each in his own way, thereby giving rise to the movement known as Absolute Idealism, see reality as universal God-like self-consciousness.
	From: Peter B. Lewis (Schopenhauer [2012], 2)
	A reaction: Is asking how anyone can possibly have believed such a bizarre and ridiculous idea a) uneducated, b) stupid, c) unimaginative, or d) very sensible? It sounds awfully like Spinoza's concept of God. Also Anaxagoras.

14. Science / D. Explanation / 2. Types of Explanation / j. Explanations by reduction

20653	Six reduction levels: groups, lives, cells, molecules, atoms, particles [Putnam/Oppenheim, by Watson]
	Full Idea: There are six 'reductive levels' in science: social groups, (multicellular) living things, cells, molecules, atoms, and elementary particles.
	From: report of H.Putnam/P.Oppenheim (Unity of Science as a Working Hypothesis [1958]) by Peter Watson - Convergence 10 'Intro'
	A reaction: I have the impression that fields are seen as more fundamental that elementary particles. What is the status of the 'laws' that are supposed to govern these things? What is the status of space and time within this picture?