Combining Texts

Ideas for 'Commentary on 'De Anima'', 'From Metaphysics to Ethics' and 'Our Knowledge of the External World'

unexpand these ideas     |    start again     |     choose another area for these texts

display all the ideas for this combination of texts

---

2 ideas

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / a. Qualities in perception

6991	We examine objects to determine colour; we do not introspect [Jackson]
	Full Idea: We examine objects to determine their colour; we do not introspect.
	From: Frank Jackson (From Metaphysics to Ethics [1998], Ch.3)
	A reaction: Interesting, but the theory of secondary qualities did not arise from experience, but from a theory about what is actually going on. Compare pain appearing to be in your foot.

12. Knowledge Sources / B. Perception / 4. Sense Data / c. Unperceived sense-data

21583	When sense-data change, there must be indistinguishable sense-data in the process [Russell]
	Full Idea: In all cases of sense-data capable of gradual change, we may find one sense-datum indistinguishable from another, and that indistinguishable from a third, while yet the first and third are quite easily distinguishable.
	From: Bertrand Russell (Our Knowledge of the External World [1914], 5)
	A reaction: This point is key to the sense-data theory, because it gives them independent existence, standing between reality and subjective experience. It is also the reason why they look increasingly implausible, if they may not be experienced.