Combining Texts

All the ideas for 'The Logical Syntax of Language', 'Schopenhauer' and '23: Book of Isaiah'

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6 ideas

1. Philosophy / D. Nature of Philosophy / 2. Invocation to Philosophy
Let us reason together, saith the Lord [Isaiah]
     Full Idea: Come now, and let us reason together, saith the Lord.
     From: Isaiah (23: Book of Isaiah [c.680 BCE], 01.18)
     A reaction: A verse which not only offers Biblical support for philosophy, but would also seem to be a challenge to Christian fideists.
2. Reason / A. Nature of Reason / 5. Objectivity
We become objective when we detach ourselves from the world [Janaway]
     Full Idea: We apprehend the world purely objectively, only when we no longer know that we belong to it.
     From: Christopher Janaway (Schopenhauer [1994], II:368), quoted by Christopher Janaway - Schopenhauer 6 'Objectivity'
     A reaction: Since we are not actually detached from the world, that makes objective thought an act of imagination. And none the worse for that, I would say, since philosophers don't seem to understand the central epistemological importance of imagination.
5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence
Carnap defined consequence by contradiction, but this is unintuitive and changes with substitution [Tarski on Carnap]
     Full Idea: Carnap proposed to define consequence as 'sentence X follows from the sentences K iff the sentences K and the negation of X are contradictory', but 1) this is intuitively impossible, and 2) consequence would be changed by substituting objects.
     From: comment on Rudolph Carnap (The Logical Syntax of Language [1934], p.88-) by Alfred Tarski - The Concept of Logical Consequence p.414
     A reaction: This seems to be the first step in the ongoing explicit discussion of the nature of logical consequence, which is now seen by many as the central concept of logic. Tarski brings his new tool of 'satisfaction' to bear.
5. Theory of Logic / C. Ontology of Logic / 4. Logic by Convention
Each person is free to build their own logic, just by specifying a syntax [Carnap]
     Full Idea: In logic, there are no morals. Everyone is at liberty to build his own logic, i.e. his own form of language. All that is required is that he must state his methods clearly, and give syntactical rules instead of philosophical arguments.
     From: Rudolph Carnap (The Logical Syntax of Language [1934], §17), quoted by JC Beall / G Restall - Logical Pluralism 7.3
     A reaction: This is understandable, but strikes me as close to daft relativism. If I specify a silly logic, I presume its silliness will be obvious. By what criteria? I say the world dictates the true logic, but this is a minority view.
27. Natural Reality / E. Cosmology / 1. Cosmology
The world is established, and cannot be moved [Isaiah]
     Full Idea: The world is also established, that it cannot be moved.
     From: Isaiah (23: Book of Isaiah [c.680 BCE], 93.1)
     A reaction: This verse caused big trouble for Galileo. The only reason I can think of for Isaiah to write this is that occasionally people were prone to panic, and worry that the Earth might suddenly and abruptly be moved.
28. God / A. Divine Nature / 1. God
Beside me there is no God [Isaiah]
     Full Idea: I am the first, and I am the last; and beside me there is no God.
     From: Isaiah (23: Book of Isaiah [c.680 BCE], 44.06)
     A reaction: This seems to be the first clear statement (c. 680 BCE) of monotheism, certainly preceding any Greek views on the subject (cf. Idea 2629,Idea 7347). It is not just an arrogant assertion by the jews, but a humble sacrifice, donating their god to humanity.