9 ideas
3035 | Dialectic involves conversations with short questions and brief answers [Diog. Laertius] |
Full Idea: Dialectic is when men converse by putting short questions and giving brief answers to those who question them. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 3.1.52) |
1816 | Sceptics say demonstration depends on self-demonstrating things, or indemonstrable things [Diog. Laertius] |
Full Idea: Sceptics say that every demonstration depends on things which demonstrates themselves, or on things which can't be demonstrated. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 9.Py.11) | |
A reaction: This refers to two parts of Agrippa's Trilemma (the third being that demonstration could go on forever). He makes the first option sound very rationalist, rather than experiential. |
1819 | Scepticism has two dogmas: that nothing is definable, and every argument has an opposite argument [Diog. Laertius] |
Full Idea: Sceptics actually assert two dogmas: that nothing should be defined, and that every argument has an opposite argument. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 9.Py.11) |
3064 | When sceptics say that nothing is definable, or all arguments have an opposite, they are being dogmatic [Diog. Laertius] |
Full Idea: When sceptics say that they define nothing, and that every argument has an opposite argument, they here give a positive definition, and assert a positive dogma. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 9.11.11) |
3033 | Induction moves from some truths to similar ones, by contraries or consequents [Diog. Laertius] |
Full Idea: Induction is an argument which by means of some admitted truths establishes naturally other truths which resemble them; there are two kinds, one proceeding from contraries, the other from consequents. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 3.1.23) |
11127 | If concepts just are mental representations, what of concepts we may never acquire? [Peacocke] |
Full Idea: We might say that the concept just is the mental representation, ...but there are concepts that human beings may never acquire. ...But if concepts are individuated by their possession conditions this will not be a problem. | |
From: Christopher Peacocke (Rationale and Maxims in Study of Concepts [2005], p.169), quoted by E Margolis/S Laurence - Concepts 1.3 | |
A reaction: I'm not sure that I understand the notion of a concept we (or any other creature) may never acquire. They no more seem to exist than buildings that were never even designed. |
1838 | Cyrenaic pleasure is a motion, but Epicurean pleasure is a condition [Diog. Laertius] |
Full Idea: Cyrenaics place pleasure wholly in motion, whereas Epicurus admits it as a condition. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 10.28) | |
A reaction: Not a distinction we meet in modern discussions. Do events within the mind count as 'motion'? If so, these two agree. If not, I'd vote for Epicurus. |
1769 | Cynics believe that when a man wishes for nothing he is like the gods [Diog. Laertius] |
Full Idea: Cynics believe that when a man wishes for nothing he is like the gods. | |
From: Diogenes Laertius (Lives of Eminent Philosophers [c.250], 6.Men.3) |
7903 | The six perfections are giving, morality, patience, vigour, meditation, and wisdom [Nagarjuna] |
Full Idea: The six perfections are of giving, morality, patience, vigour, meditation, and wisdom. | |
From: Nagarjuna (Mahaprajnaparamitashastra [c.120], 88) | |
A reaction: What is 'morality', if giving is not part of it? I like patience and vigour being two of the virtues, which immediately implies an Aristotelian mean (which is always what is 'appropriate'). |