display all the ideas for this combination of texts
2 ideas
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
Full Idea: Archelaus was the first person to say that the universe is boundless. | |
From: report of Archelaus (fragments/reports [c.450 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 02.Ar.3 |
12265 | All water is the same, because of a certain similarity [Aristotle] |
Full Idea: Any water is said to be specifically the same as any other water because it has a certain similarity to it. | |
From: Aristotle (Topics [c.331 BCE], 103a20) | |
A reaction: (Cf. Idea 8153) It take this to be the hallmark of a natural kind, and we should not lose sight of it in the midst of discussions about rigid designation and essential identity. Tigers are only a natural kind insofar as they are indistinguishable. |