Combining Philosophers

Ideas for Herodotus, John Rawls and Stephen Yablo

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3 ideas

4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic

19006	An 'enthymeme' is an argument with an indispensable unstated assumption [Yablo]
	Full Idea: An 'enthymeme' is a deductive argument with an unstated assumption that must be true for the premises to lead to the conclusion.
	From: Stephen Yablo (Aboutness [2014], 11.1)

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic

8859	The main modal logics disagree over three key formulae [Yablo]
	Full Idea: Lewis's different systems of modal logic differed about such formulae as □P implies □□P; ◊□P implies □P; and ◊S implies □◊S
	From: Stephen Yablo (Apriority and Existence [2000], §06)
	A reaction: Yablo's point is that the various version don't seem to make much difference to our practices in logic, mathematics and science. The problem, says Yablo, is deciding exactly what you mean by 'necessarily' and 'possibly'.

4. Formal Logic / G. Formal Mereology / 3. Axioms of Mereology

18999	y is only a proper part of x if there is a z which 'makes up the difference' between them [Yablo]
	Full Idea: The principle of Supplementation says that y is properly part of x, only if a z exists that 'makes up the difference' between them. [note: that is, z is disjoint from y and sums with y to form x]
	From: Stephen Yablo (Aboutness [2014], 03.2)