Combining Texts

All the ideas for 'works (fragments)', 'The Realm of Matter' and 'The Nature and Communication of Substance'

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6 ideas

5. Theory of Logic / L. Paradox / 1. Paradox

6007	If you know your father, but don't recognise your father veiled, you know and don't know the same person [Eubulides, by Dancy,R]
	Full Idea: The 'undetected' or 'veiled' paradox of Eubulides says: if you know your father, and don't know the veiled person before you, but that person is your father, you both know and don't know the same person.
	From: report of Eubulides (fragments/reports [c.390 BCE]) by R.M. Dancy - Megarian School
	A reaction: Essentially an uninteresting equivocation on two senses of "know", but this paradox comes into its own when we try to give an account of how linguistic reference works. Frege's distinction of sense and reference tried to sort it out (Idea 4976).

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / a. The Liar paradox

6006	If you say truly that you are lying, you are lying [Eubulides, by Dancy,R]
	Full Idea: The liar paradox of Eubulides says 'if you state that you are lying, and state the truth, then you are lying'.
	From: report of Eubulides (fragments/reports [c.390 BCE]) by R.M. Dancy - Megarian School
	A reaction: (also Cic. Acad. 2.95) Don't say it, then. These kind of paradoxes of self-reference eventually lead to Russell's 'barber' paradox and his Theory of Types.

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / b. The Heap paradox ('Sorites')

6008	Removing one grain doesn't destroy a heap, so a heap can't be destroyed [Eubulides, by Dancy,R]
	Full Idea: The 'sorites' paradox of Eubulides says: if you take one grain of sand from a heap (soros), what is left is still a heap; so no matter how many grains of sand you take one by one, the result is always a heap.
	From: report of Eubulides (fragments/reports [c.390 BCE]) by R.M. Dancy - Megarian School
	A reaction: (also Cic. Acad. 2.49) This is a very nice paradox, which goes to the heart of our bewilderment when we try to fully understand reality. It homes in on problems of identity, as best exemplified in the Ship of Theseus (Ideas 1212 + 1213).

7. Existence / A. Nature of Existence / 6. Criterion for Existence

18521	The criterion of existence is the possibility of action [Santayana]
	Full Idea: The possibility of action ...is the criterion of existence, and the test of substantiality.
	From: George Santayana (The Realm of Matter [1930], p.107), quoted by John Heil - The Universe as We Find It
	A reaction: I rather like this. I think I would say the power is the criterion of existence.

17. Mind and Body / A. Mind-Body Dualism / 5. Parallelism

2596	Maybe mind and body are parallel, like two good clocks [Leibniz]
	Full Idea: Two clocks in perfect agreement must be by natural influence, or the control of a craftsman, or their perfect construction at the beginning. Only the third way (of "preestablished harmony" by God) is possible.
	From: Gottfried Leibniz (The Nature and Communication of Substance [1690], p.121)
	A reaction: Presumably 'natural influence' would cover the possibility that (unnoticed by you, apparently) one clock is attached to the other clock at the relevant points. If they are unconnected, presumably they are quite unaware of one another's existence.

28. God / B. Proving God / 3. Proofs of Evidence / b. Teleological Proof

2595	If the universe is a perfect agreement of uncommunicating substances, there must be a common source [Leibniz]
	Full Idea: The perfect agreement of so many substances which have no communication whatever with each other can only come from a common source.
	From: Gottfried Leibniz (The Nature and Communication of Substance [1690], p.120)