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Full Idea
It is not necessary for a sea-battle to take place tomorrow, nor for one not to take place tomorrow - though it is necessary for one to take place OR not take place tomorrow.
Gist of Idea
It is necessary that either a sea-fight occurs tomorrow or it doesn't, though neither option is in itself necessary
Source
Aristotle (On Interpretation [c.330 BCE], 19a30)
Book Ref
Aristotle: 'Categories and De Interpretatione', ed/tr. Ackrill,J.R. [OUP 1963], p.53
Related Idea
Idea 21389 Carneades distinguished logical from causal necessity, when talking of future events [Long on Carneades]
1703 | It is necessary that either a sea-fight occurs tomorrow or it doesn't, though neither option is in itself necessary [Aristotle] |
21388 | The causes of future true events must exist now, so they will happen because of destiny [Chrysippus, by Cicero] |
21390 | Future events are true if one day we will say 'this event is happening now' [Carneades] |
21672 | We say future things are true that will possess actuality at some following time [Carneades, by Cicero] |
15186 | In the tenseless view, all times are equally real, so statements of the future have truth-values [Le Poidevin] |