13 ideas
19426 | 'Nominal' definitions just list distinguishing characteristics [Leibniz] |
Full Idea: A 'nominal' definition is nothing more than an enumeration of the sufficient distinguishing characteristics. | |
From: Gottfried Leibniz (Reflections on Knowledge, Truth and Ideas [1684], p.284) | |
A reaction: Not wholly clear. Are these actual distinguishing characteristics, or potential ones? Could DNA be part of a human's nominal definition (for an unidentified corpse, perhaps). |
16066 | Additional or removal of any part changes a thing, so people are never the same person [Epicharmus] |
Full Idea: If you add or take away a pebble, the same number does not remain. If you add to a length or cut off from it, the former measure does not remain. So human beings grow or waste away. Both you and I were, and shall be, other men. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B02), quoted by Diogenes Laertius - Lives of Eminent Philosophers 03.12 | |
A reaction: [The original is in dialogue form from a play. The context is a joke about not paying a debt.] Note the early date for this metaphysical puzzle. My new favourite reply is Chrysippus's Idea 16059; identity actually requires change. |
19424 | Knowledge needs clarity, distinctness, and adequacy, and it should be intuitive [Leibniz] |
Full Idea: Knowledge is either obscure or clear; clear ideas are either indistinct or distinct; distinct ideas are either adequate or inadequate, symbolic or intuitive; perfect knowledge is that which is both adequate and intuitive. | |
From: Gottfried Leibniz (Reflections on Knowledge, Truth and Ideas [1684], p.283) | |
A reaction: This is Leibniz's expansion of Descartes's idea that knowledge rests on 'clear and distinct conceptions'. The ultimate target seems to be close to an Aristotelian 'real definition', which is comprehensive and precise. Does 'intuitive' mean coherent? |
436 | A dog seems handsome to another a dog, and even a pig to another pig [Epicharmus] |
Full Idea: Dog seems very handsome to dog, and ox to ox, and donkey very handsome to donkey, and even pig to pig. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B05), quoted by (who?) - where? |
19427 | True ideas represent what is possible; false ideas represent contradictions [Leibniz] |
Full Idea: An idea is true if what it represents is possible; false if the representation contains a contradiction. | |
From: Gottfried Leibniz (Reflections on Knowledge, Truth and Ideas [1684], p.287) | |
A reaction: Odd in the analytic tradition to talk of a single idea or concept (rather than a proposition or utterance) as being 'true'. But there is clearly a notion of valid or legitimate or useful concepts here. Hilbert said true just meant non-contradictory. |
442 | Pleasures are like pirates - if you are caught they drown you in a sea of pleasures [Epicharmus] |
Full Idea: Pleasures for mortals are like impious pirates, for the man who is caught by pleasures is immediately drowned in a sea of them. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B44), quoted by (who?) - where? | |
A reaction: Not all slopes are slippery. Plenty of people hold themselves to strict rules about alcohol or gambling. People have occasional treats. |
440 | Hands wash hands; give that you may get [Epicharmus] |
Full Idea: The hand washes the hand; give something and you may get something. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B30), quoted by (who?) - where? |
441 | Against a villain, villainy is not a useless weapon [Epicharmus] |
Full Idea: Against a villain, villainy is not a useless weapon. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B32), quoted by (who?) - where? |
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 |
19425 | In the schools the Four Causes are just lumped together in a very obscure way [Leibniz] |
Full Idea: In the schools the four causes are lumped together as material, formal, efficient, and final causes, but they have no clear definitions, and I would call such a judgment 'obscure'. | |
From: Gottfried Leibniz (Reflections on Knowledge, Truth and Ideas [1684], p.283) | |
A reaction: He picks this to illustrate what he means by 'obscure', so he must feel strongly about it. Elsewhere Leibniz embraces efficient and final causes, but says little of the other two. This immediately become clearer as the Four Modes of Explanation. |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |
Full Idea: Archelaus wrote that life on Earth began in a primeval slime. | |
From: report of Archelaus (fragments/reports [c.450 BCE]) by Malcolm Schofield - Archelaus | |
A reaction: This sounds like a fairly clearcut assertion of the production of life by evolution. Darwin's contribution was to propose the mechanism for achieving it. We should honour the name of Archelaus for this idea. |
439 | God knows everything, and nothing is impossible for him [Epicharmus] |
Full Idea: Nothing escapes the divine, this you must realise. God himself is our overseer, and nothing is impossible for him. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B23), quoted by (who?) - where? |
443 | Human logos is an aspect of divine logos, and is sufficient for successful living [Epicharmus] |
Full Idea: Man has calculation, but there is also the divine logos. But human logos is sprung from the divine logos, and it brings to each man his means of life, and his maintenance. | |
From: Epicharmus (comedies (frags) [c.470 BCE], B57), quoted by (who?) - where? |