3 ideas
| 3299 | In logic identity involves reflexivity (x=x), symmetry (if x=y, then y=x) and transitivity (if x=y and y=z, then x=z) [Baillie] |
| Full Idea: In logic identity is an equivalence relation, which involves reflexivity (x=x), symmetry (if x=y, then y=x), and transitivity (if x=y and y=z, then x=z). | |
| From: James Baillie (Problems in Personal Identity [1993], Intr p.4) |
| 20653 | Six reduction levels: groups, lives, cells, molecules, atoms, particles [Putnam/Oppenheim, by Watson] |
| Full Idea: There are six 'reductive levels' in science: social groups, (multicellular) living things, cells, molecules, atoms, and elementary particles. | |
| From: report of H.Putnam/P.Oppenheim (Unity of Science as a Working Hypothesis [1958]) by Peter Watson - Convergence 10 'Intro' | |
| A reaction: I have the impression that fields are seen as more fundamental that elementary particles. What is the status of the 'laws' that are supposed to govern these things? What is the status of space and time within this picture? |
| 7811 | Sophoclean heroes die terrible deaths when they oppose the new Athenian values [Sophocles, by Grayling] |
| Full Idea: Sophocles has Ajax (in 'Ajax') and Hercules (in 'Trachiniae') die terrible deaths because of the opposition they represent to the values which are the new values of Periclean Athens. | |
| From: report of Sophocles (Women of Trachis [c.430 BCE]) by A.C. Grayling - What is Good? Ch.2 | |
| A reaction: Presumably they are tragic heroes, who hence invite our sympathy, like Othello and Hamlet, who also die following an older moral code. It is only tragic if the code they follow has something 'higher' about it. |