Ideas from 'On Certainty' by Ludwig Wittgenstein [1951], by Theme Structure

[found in 'On Certainty' by Wittgenstein,Ludwig (ed/tr Anscombe,E.) [Blackwell 1979,0-631-169407]].

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13. Knowledge Criteria / B. Internal Justification / 4. Foundationalism / a. Foundationalism
Foundations need not precede other beliefs
13. Knowledge Criteria / D. Scepticism / 6. Scepticism Critique
Total doubt can't even get started
19. Language / B. Meaning / 12. Denial of Meanings
If you are not certain of any fact, you cannot be certain of the meaning of your words either