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Ideas for
'Classical Cosmology (frags)', 'Thought' and 'works'
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6 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
3093
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Any two states are logically linked, by being entailed by their conjunction [Harman]
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Full Idea:
Any two states of affairs are logically connected, simply because both are entailed by their conjunction.
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From:
Gilbert Harman (Thought [1973], 8.1)
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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
3098
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Deductive logic is the only logic there is [Harman]
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Full Idea:
Deductive logic is the only logic there is.
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From:
Gilbert Harman (Thought [1973], 10.4)
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5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
3094
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You don't have to accept the conclusion of a valid argument [Harman]
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Full Idea:
We may say "From P and If-P-then-Q, infer Q" (modus ponens), but there is no rule of acceptance to say that we should accept Q. Maybe we should stop believing P or If-P-then-Q rather than believe Q.
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From:
Gilbert Harman (Thought [1973], 10.1)
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5. Theory of Logic / E. Structures of Logic / 1. Logical Form
3084
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Our underlying predicates represent words in the language, not universal concepts [Harman]
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Full Idea:
The underlying truth-conditional structures of thoughts are language-dependent in the sense that underlying predicates represent words in the language rather than universal concepts common to all languages.
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From:
Gilbert Harman (Thought [1973], 6.3)
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3080
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Logical form is the part of a sentence structure which involves logical elements [Harman]
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Full Idea:
The logical form of a sentence is that part of its structure that involves logical elements.
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From:
Gilbert Harman (Thought [1973], 5.2)
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3081
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A theory of truth in a language must involve a theory of logical form [Harman]
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Full Idea:
Some sort of theory of logical form is involved in any theory of truth for a natural language.
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From:
Gilbert Harman (Thought [1973], 5.2)
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