Combining Philosophers

Ideas for Eubulides, Geoffrey Hellman and Ian Rumfitt

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5 ideas

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

12195

Soundness in argument varies with context, and may be achieved very informally indeed [Rumfitt]

12199

There is a modal element in consequence, in assessing reasoning from suppositions [Rumfitt]

12201

We reject deductions by bad consequence, so logical consequence can't be deduction [Rumfitt]

18813

Logical consequence is a relation that can extended into further statements [Rumfitt]

5. Theory of Logic / B. Logical Consequence / 3. Deductive Consequence |-

18808

Normal deduction presupposes the Cut Law [Rumfitt]