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Ideas for 'works', 'Lives of Eminent Philosophers' and 'How the Laws of Physics Lie'

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13. Knowledge Criteria / D. Scepticism / 1. Scepticism

1819	Scepticism has two dogmas: that nothing is definable, and every argument has an opposite argument [Diog. Laertius]
	Full Idea: Sceptics actually assert two dogmas: that nothing should be defined, and that every argument has an opposite argument.
	From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 9.Py.11)

13. Knowledge Criteria / D. Scepticism / 6. Scepticism Critique

3064	When sceptics say that nothing is definable, or all arguments have an opposite, they are being dogmatic [Diog. Laertius]
	Full Idea: When sceptics say that they define nothing, and that every argument has an opposite argument, they here give a positive definition, and assert a positive dogma.
	From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 9.11.11)