Ideas from 'Speaking of Objects' by Willard Quine [1960], by Theme Structure

[found in 'Ontological Relativity and Other Essays' by Quine,Willard [Columbia 1969,0-231-08357-2]].

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7. Existence / C. Structure of Existence / 7. Abstract/Concrete / a. Abstract/concrete
We can only see an alien language in terms of our own thought structures (e.g. physical/abstract)
7. Existence / D. Theories of Reality / 10. Ontological Commitment / b. Commitment of quantifiers
"No entity without identity" - our ontology must contain items with settled identity conditions
8. Modes of Existence / B. Properties / 12. Denial of Properties
There is no proper identity concept for properties, and it is hard to distinguish one from two
9. Objects / A. Existence of Objects / 2. Abstract Objects / b. Need for abstracta
Our conceptual scheme becomes more powerful when we posit abstract objects
9. Objects / A. Existence of Objects / 4. Individuation / a. Individuation
I prefer 'no object without identity' to Quine's 'no entity without identity'
19. Language / G. Interpretation / 2. Indeterminacy
You could know the complete behavioural conditions for a foreign language, and still not know their beliefs
Translation of our remote past or language could be as problematic as alien languages