Combining Texts

All the ideas for 'Alcibiades', 'On the General Idea of Proof Theory' and 'Can there be Vague Objects?'

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9 ideas

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

13827

Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz]

5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models

13826

Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]

7. Existence / D. Theories of Reality / 10. Vagueness / b. Vagueness of reality

16129

Evans argues (falsely!) that a contradiction follows from treating objects as vague [Evans, by Lowe]

16459

Is it coherent that reality is vague, identities can be vague, and objects can have fuzzy boundaries? [Evans]

16457

There clearly are vague identity statements, and Evans's argument has a false conclusion [Evans, by Lewis]

16460

Evans assumes there can be vague identity statements, and that his proof cannot be right [Evans, by Lewis]

9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects

14484

If a=b is indeterminate, then a=/=b, and so there cannot be indeterminate identity [Evans, by Thomasson]

9. Objects / F. Identity among Objects / 6. Identity between Objects

16224

There can't be vague identity; a and b must differ, since a, unlike b, is only vaguely the same as b [Evans, by PG]

17. Mind and Body / A. Mind-Body Dualism / 1. Dualism

3519	Man uses his body, so must be separate from it [Anon (Plat), by Maslin]