more from Peter Unger

Single Idea 8724

[catalogued under 13. Knowledge Criteria / C. External Justification / 6. Contextual Justification / b. Invariantism]

Full Idea

There is no reason to suppose that the meaning of 'know' changes from the courtroom to the living room and back again; no more than for supposing that 'vacuum' changes from the laboratory to the cannery.

Gist of Idea

The meaning of 'know' does not change from courtroom to living room


Peter Unger (Ignorance: a Case for Scepticism [1975], 2.1)

Book Reference

Unger,Peter: 'Ignorance: a Case for Scepticism' [OUP 1975], p.53

A Reaction

I disagree. Lots of words change their meaning (or reference) according to context. Flat, fast, tall, clever. She 'knows a lot' certainly requires a context. The bar of justification goes up and down, and 'knowledge' changes accordingly.