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Single Idea 5404
[filed under theme 12. Knowledge Sources / A. A Priori Knowledge / 4. A Priori as Necessities
]
Full Idea
Two physical objects and two other physical objects must make four physical objects, even if physical objects cannot be experienced, so Kant's solution unduly limits the scope of a priori propositions.
Gist of Idea
Two plus two objects make four objects even if experience is impossible, so Kant is wrong
Source
comment on Immanuel Kant (Critique of Pure Reason [1781]) by Bertrand Russell - Problems of Philosophy Ch.8
Book Ref
Russell,Bertrand: 'The Problems of Philosophy' [OUP 1995], p.49
A Reaction
The point seems good, though it is doubtful whether Russell is entitled to be so confident. If the basis of a priori certainty is pushed outside the mind, our ontology becomes dramatically more complicated.
The
19 ideas
with the same theme
[a priori knowledge is an insight into necessary truths]:
2279
|
A triangle has a separate non-invented nature, shown by my ability to prove facts about it
[Descartes]
|
2602
|
What experience could prove 'If a=c and b=c then a=b'?
[Descartes]
|
5012
|
'Nothing comes from nothing' is an eternal truth found within the mind
[Descartes]
|
9344
|
Mathematical analysis ends in primitive principles, which cannot be and need not be demonstrated
[Leibniz]
|
9155
|
An a priori proof is independent of experience
[Leibniz]
|
5404
|
Two plus two objects make four objects even if experience is impossible, so Kant is wrong
[Russell on Kant]
|
9345
|
Propositions involving necessity are a priori, and pure a priori if they only derive from other necessities
[Kant]
|
16893
|
The apriori is independent of its sources, and marked by necessity and generality
[Kant, by Burge]
|
9347
|
A priori knowledge is indispensable for the possibility and certainty of experience
[Kant]
|
9352
|
An a priori truth is one derived from general laws which do not require proof
[Frege]
|
16889
|
A truth is a priori if it can be proved entirely from general unproven laws
[Frege]
|
16894
|
An apriori truth is grounded in generality, which is universal quantification
[Frege, by Burge]
|
5397
|
The rationalists were right, because we know logical principles without experience
[Russell]
|
5198
|
We could verify 'a thing can't be in two places at once' by destroying one of the things
[Ierubino on Ayer]
|
9354
|
Why should necessities only be knowable a priori? That Hesperus is Phosporus is known empirically
[Devitt]
|
19565
|
How could the mind have a link to the necessary character of reality?
[Devitt]
|
20472
|
Analysis of the a priori by necessity or analyticity addresses the proposition, not the justification
[Casullo]
|
14712
|
A sentence is a priori if no possible way the world might actually be could make it false
[Chalmers]
|
9369
|
'Snow is white or it isn't' is just true, not made true by stipulation
[Boghossian]
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