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Single Idea 18993

[filed under theme 14. Science / C. Induction / 5. Paradoxes of Induction / b. Raven paradox ]

Full Idea

'All crows are black' cannot say quite the same as 'All non-black things are non-crows', for the two are confirmed by different evidence. Subject matter looks to be the distinguishing feature. One is about crows, the other not.

Gist of Idea

If sentences point to different evidence, they must have different subject-matter

Source

Stephen Yablo (Aboutness [2014], Intro)

Book Ref

Yablo,Stephen: 'Aboutness' [Princeton 2014], p.2

A Reaction

You might reply that they are confirmed by the same evidence (but only in its unobtainable totality). The point, I think, is that the sentences invite you to start your search in different places.

The 14 ideas from 'Aboutness'

18993 If sentences point to different evidence, they must have different subject-matter [Yablo]
18992 Sentence-meaning is the truth-conditions - plus factors responsible for them [Yablo]
18994 The content of an assertion can be quite different from compositional content [Yablo]
18996 A statement S is 'partly true' if it has some wholly true parts [Yablo]
18997 Truth-conditions as subject-matter has problems of relevance, short cut, and reversal [Yablo]
18999 y is only a proper part of x if there is a z which 'makes up the difference' between them [Yablo]
18998 Parthood lacks the restriction of kind which most relations have [Yablo]
19001 'Pegasus doesn't exist' is false without Pegasus, yet the absence of Pegasus is its truthmaker [Yablo]
19002 A nominalist can assert statements about mathematical objects, as being partly true [Yablo]
19003 Most people say nonblack nonravens do confirm 'all ravens are black', but only a tiny bit [Yablo]
19004 Gettier says you don't know if you are confused about how it is true [Yablo]
19005 Not-A is too strong to just erase an improper assertion, because it actually reverses A [Yablo]
19006 An 'enthymeme' is an argument with an indispensable unstated assumption [Yablo]
19007 A theory need not be true to be good; it should just be true about its physical aspects [Yablo]