Combining Philosophers

Ideas for Aristotle, Allan Gibbard and Deborah Achtenberg

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23 ideas

10. Modality / A. Necessity / 2. Nature of Necessity
What is necessary cannot be otherwise [Aristotle]
Necessity makes alternatives impossible [Aristotle]
10. Modality / A. Necessity / 3. Types of Necessity
A stone travels upwards by a forced necessity, and downwards by natural necessity [Aristotle]
10. Modality / A. Necessity / 4. De re / De dicto modality
A deduction is necessary if the major (but not the minor) premise is also necessary [Aristotle]
10. Modality / A. Necessity / 6. Logical Necessity
Reasoning is when some results follow necessarily from certain claims [Aristotle]
A thing has a feature necessarily if its denial brings a contradiction [Aristotle]
10. Modality / B. Possibility / 1. Possibility
The actual must be possible, because it occurred [Aristotle]
Possibility is when the necessity of the contrary is false [Aristotle]
Anything which is possible either exists or will come into existence [Aristotle]
10. Modality / B. Possibility / 4. Potentiality
Things are destroyed not by their powers, but by their lack of them [Aristotle]
Potentialities are always for action, but are conditional on circumstances [Aristotle]
We recognise potentiality from actuality [Aristotle]
Matter is potentiality [Aristotle, by Politis]
A 'potentiality' is a principle of change or process in a thing [Aristotle]
10. Modality / B. Possibility / 7. Chance
Chance is a coincidental cause among events involving purpose and choice [Aristotle]
Maybe there is no pure chance; a man's choices cause his chance meetings [Aristotle]
Intrinsic cause is prior to coincidence, so nature and intelligence are primary causes, chance secondary [Aristotle]
10. Modality / C. Sources of Modality / 6. Necessity from Essence
The two right angles of a triangle necessitate that a quadrilateral has four [Aristotle]
Some things have external causes of their necessity; others (the simple) generate necessities [Aristotle]
Aristotle's says necessary truths are distinct and derive from essential truths [Aristotle, by Koslicki]
10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity
Possible worlds identity needs a sortal [Gibbard]
Only concepts, not individuals, can be the same across possible worlds [Gibbard]
10. Modality / E. Possible worlds / 3. Transworld Objects / b. Rigid designation
Kripke's semantics needs lots of intuitions about which properties are essential [Gibbard]