display all the ideas for this combination of texts
7 ideas
| 15769 | Anything which is possible either exists or will come into existence [Aristotle] |
| Full Idea: If what we have stated either is the possible or something connected to it, there can of course be no question of its being true to say that x is capable of being but will not be. ...What is not but is capable of being either is or comes into being. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1047b05) | |
| A reaction: I'm a bit startled to find the great Aristotle spouting this nonsense. It's possible that every bird in England could simultaneously land in my home town, but it ain't never going to happen. Modern women could bear 50 children, but won't. |
| 8554 | Possible difference across worlds depends on difference across time in the actual world [Shoemaker] |
| Full Idea: The ways in which a given thing can be different in different possible worlds depend on the ways in which such a thing can be different at different times in the actual world. | |
| From: Sydney Shoemaker (Causality and Properties [1980], §05) | |
| A reaction: Where change in a thing is possible across time in the actual world seems to require a combination of experiment and imagination. Unimaginability does not entail necessity, but it may be the best guide we have got. |
| 15779 | Possibility is when the necessity of the contrary is false [Aristotle] |
| Full Idea: The potential occurs when it is not necessary that its contrary be false. For example, it is potential that a man should be seated, since it is not false of necessity that he is not seated. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1019b26) | |
| A reaction: This is the standard point in modal logic that possibly is equivalent to not-necessarily-not (◊p → ¬□¬p). |
| 15777 | A 'potentiality' is a principle of change or process in a thing [Aristotle] |
| Full Idea: What is a principle of change or process is said to be a 'potentiality' [dunamis], whether in something else or in the thing itself qua something else. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1019a18) |
| 15778 | Things are destroyed not by their powers, but by their lack of them [Aristotle] |
| Full Idea: Things are broken, compressed, bent and, in a word, destroyed not by dint of having a potentiality but by dint of not having one and by missing out on something. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1019a27) | |
| A reaction: Presumably an ontology entirely based on powers would not also need to catalogue absence of powers. The positive ones do the job. No power, no destruction. |
| 14544 | Potentialities are always for action, but are conditional on circumstances [Aristotle] |
| Full Idea: The possession of a potentiality just is the possession of a potentiality to act, and such a potentiality is not unconditional but depends on the obtaining of propitious circumstances, which includes the satisfaction of a ceteris paribus condition. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1048a18) | |
| A reaction: This seems to be pretty exactly what we mean by a 'power', as something which requires no other driving force, but which only expresses itself with the endless complexity of the rest of nature. |
| 15774 | We recognise potentiality from actuality [Aristotle] |
| Full Idea: It is from the actuality that the potentiality is recognised. | |
| From: Aristotle (Metaphysics [c.324 BCE], 1051a29) | |
| A reaction: I presume it is from this simple fact that Sider and others draw the mistaken inference that there are no potentialities in the actual world. |