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Single Idea 9123
[filed under theme 2. Reason / B. Laws of Thought / 3. Non-Contradiction
]
Full Idea
Priest says there is room for contradictions. He gives the example of someone in a doorway; is he in or out of the room. Given that in and out are mutually exclusive and exhaustive, and neither is the default, he seems to be both in and not in.
Gist of Idea
Someone standing in a doorway seems to be both in and not-in the room
Source
report of Graham Priest (What is so bad about Contradictions? [1998]) by Roy Sorensen - Vagueness and Contradiction 4.3
Book Ref
Sorensen,Roy: 'Vagueness and Contradiction' [OUP 2004], p.73
A Reaction
Priest is a clever lad, but I don't think I can go with this. It just seems to be an equivocation on the word 'in' when applied to rooms. First tell me the criteria for being 'in' a room. What is the proposition expressed in 'he is in the room'?
The
22 ideas
with the same theme
[a proposition is claimed to be both true and false]:
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12268
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Contradiction is impossible
[Antisthenes (I), by Aristotle]
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23917
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Contrary statements can both be reasonable, if they are meant in two different ways
[Aristotle]
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6561
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A thing cannot be both in and not-in the same thing (at a given time)
[Aristotle]
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11281
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We cannot say that one thing both is and is not a man
[Aristotle]
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1602
|
For Aristotle predication is regulated by Non-Contradiction, because underlying stability is essential
[Roochnik on Aristotle]
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1601
|
The most certain basic principle is that contradictories can't be true at the same time
[Aristotle]
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11282
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Aristotle does not take the principle of non-contradiction for granted
[Aristotle, by Politis]
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9108
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From an impossibility anything follows
[William of Ockham]
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15616
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If truth is just non-contradiction, we must take care that our basic concepts aren't contradictory
[Hegel]
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21983
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Being and nothing are the same and not the same, which is the identity of identity and non-identity
[Hegel]
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21985
|
The so-called world is filled with contradiction
[Hegel]
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14787
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Self-contradiction doesn't reveal impossibility; it is inductive impossibility which reveals self-contradiction
[Peirce]
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4531
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Our inability to both affirm and deny a single thing is merely an inability, not a 'necessity'
[Nietzsche]
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22642
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Man has an intense natural interest in the consistency of his own thinking
[James]
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17632
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Non-contradiction was learned from instances, and then found to be indubitable
[Russell]
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6566
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The problem is to explain the role of contradiction in social life
[Wittgenstein]
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9023
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If you say that a contradiction is true, you change the meaning of 'not', and so change the subject
[Quine]
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6564
|
To affirm 'p and not-p' is to have mislearned 'and' or 'not'
[Quine]
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9123
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Someone standing in a doorway seems to be both in and not-in the room
[Priest,G, by Sorensen]
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4633
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You cannot rationally deny the principle of non-contradiction, because all reasoning requires it
[Baggini /Fosl]
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6565
|
The law of noncontradiction makes the distinction between asserting something and denying it
[Fogelin]
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19656
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Non-contradiction is unjustified, so it only reveals a fact about thinking, not about reality?
[Meillassoux]
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