Combining Texts

All the ideas for 'Science and Method', 'Recent Work on Consciousness' and 'Letters to Regius'

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6 ideas

6. Mathematics / A. Nature of Mathematics / 2. Geometry

10245	One geometry cannot be more true than another [Poincaré]
	Full Idea: One geometry cannot be more true than another; it can only be more convenient.
	From: Henri Poincaré (Science and Method [1908], p.65), quoted by Stewart Shapiro - Philosophy of Mathematics
	A reaction: This is the culminating view after new geometries were developed by tinkering with Euclid's parallels postulate.

9. Objects / D. Essence of Objects / 15. Against Essentialism

12251	Substantial forms are not understood, and explain nothing [Descartes]
	Full Idea: Clearly no explanation can be given by these substantial forms for any natural action, since their defenders admit that they are occult and that they do not understand them themselves, ...so they explain nothing.
	From: René Descartes (Letters to Regius [1642], 1642.01), quoted by David S. Oderberg - Real Essentialism 267 n5
	A reaction: [Oderberg gives refs for attack by Locke and Hume, p.66] Descartes' target is Aristotle's hylomorphism. The problem seems to be understanding what Aristotle meant, which is much more than mere 'shape'. More like 'controlling principle'.

15. Nature of Minds / B. Features of Minds / 3. Privacy

7522	A full neural account of qualia will give new epistemic access to them, beyond private experience [Churchlands]
	Full Idea: When the hidden neurophysiological structure of qualia (if there is any) gets revealed by unfolding research, then we will automatically gain a new epistemic access to qualia, beyond each person's native and exclusive capacity for internal discrimination.
	From: Churchland / Churchland (Recent Work on Consciousness [1997])
	A reaction: Carefully phrased and hard to deny, but something is impenetrable. What experience does an insect have when it encounters ultra-violet light? Nothing remotely interesting about their qualia is likely to emerge from the study of insect brains.

15. Nature of Minds / B. Features of Minds / 5. Qualia / c. Explaining qualia

7521	It is question-begging to assume that qualia are totally simple, hence irreducible [Churchlands]
	Full Idea: One of the crucial premises of the antireductionists - concerning the intrinsic, nonrelational, metaphysical simplicity of our sensory qualia - is a question-begging and unsupported assumption.
	From: Churchland / Churchland (Recent Work on Consciousness [1997])
	A reaction: This is a key point for reductionists, with emphasis on the sheer numbers of connections involved in a simple quale (I estimate a billion involved in one small patch of red).

7523	The qualia Hard Problem is easy, in comparison with the co-ordination of mental states [Churchlands]
	Full Idea: The so-called Hard Problem (of qualia) appears to be one of the easiest, in comparison with the problems of short-term memory, fluid and directable attention, the awake state vs sleep, and the unity of consciousness.
	From: Churchland / Churchland (Recent Work on Consciousness [1997])
	A reaction: Most of their version of the Hard Problems centre on personal identity, and the centralised co-ordination of mental events. I am inclined to agree with them. Worriers about qualia should think more about the complexity of systems of neurons.

29. Religion / B. Monotheistic Religion / 4. Christianity / c. Angels

16772	An angelic mind would not experience pain, even when connected to a human body [Descartes, by Pasnau]
	Full Idea: Descartes points out that an angelic mind, even if causally connected to a human body, would not experience the same sort of bodily sensations; it would, instead, simply observe flesh being torn, like a piece of paper.
	From: report of René Descartes (Letters to Regius [1642], III:493) by Robert Pasnau - Metaphysical Themes 1274-1671 25.6
	A reaction: Does that mean that the angel could not have the experience even if it wanted to have it. So they can't pick up a cup either? So they can't make themselves known to us, even if they are desperate to? So the Annunciation never happened?