154 ideas
9199 | Wisdom for one instant is as good as wisdom for eternity [Chrysippus] |
20853 | Wise men should try to participate in politics, since they are a good influence [Chrysippus, by Diog. Laertius] |
20772 | Three branches of philosophy: first logic, second ethics, third physics (which ends with theology) [Chrysippus] |
12274 | Begin examination with basics, and subdivide till you can go no further [Aristotle] |
3807 | Reason is and ought to be the slave of the passions [Hume] |
5969 | Chrysippus said the uncaused is non-existent [Chrysippus, by Plutarch] |
12260 | Dialectic starts from generally accepted opinions [Aristotle] |
12291 | There can't be one definition of two things, or two definitions of the same thing [Aristotle] |
12292 | Definitions are easily destroyed, since they can contain very many assertions [Aristotle] |
12272 | We describe the essence of a particular thing by means of its differentiae [Aristotle] |
12279 | The differentia indicate the qualities, but not the essence [Aristotle] |
12283 | In definitions the first term to be assigned ought to be the genus [Aristotle] |
12289 | The genera and the differentiae are part of the essence [Aristotle] |
12261 | Differentia are generic, and belong with genus [Aristotle] |
12263 | 'Genus' is part of the essence shared among several things [Aristotle] |
12285 | The definition is peculiar to one thing, not common to many [Aristotle] |
21388 | The causes of future true events must exist now, so they will happen because of destiny [Chrysippus, by Cicero] |
20780 | Graspable presentations are criteria of facts, and are molded according to their objects [Chrysippus, by Diog. Laertius] |
20793 | How could you ever know that the presentation is similar to the object? [Sext.Empiricus on Chrysippus] |
8077 | Stoic propositional logic is like chemistry - how atoms make molecules, not the innards of atoms [Chrysippus, by Devlin] |
20791 | Chrysippus has five obvious 'indemonstrables' of reasoning [Chrysippus, by Diog. Laertius] |
8078 | Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin] |
6023 | Every proposition is either true or false [Chrysippus, by Cicero] |
11261 | Puzzles arise when reasoning seems equal on both sides [Aristotle] |
12273 | Unit is the starting point of number [Aristotle] |
8649 | Two numbers are equal if all of their units correspond to one another [Hume] |
21291 | There is no medium state between existence and non-existence [Hume] |
5992 | Chrysippus says action is the criterion for existence, which must be physical [Chrysippus, by Tieleman] |
21673 | There are simple and complex facts; the latter depend on further facts [Chrysippus, by Cicero] |
12267 | There are ten categories: essence, quantity, quality, relation, place, time, position, state, activity, passivity [Aristotle] |
16652 | Stoics categories are Substrate, Quality, Disposition, and Relation [Chrysippus, by Pasnau] |
12282 | An individual property has to exist (in past, present or future) [Aristotle] |
12264 | An 'accident' is something which may possibly either belong or not belong to a thing [Aristotle] |
11942 | Power is the possibility of action, as discovered by experience [Hume] |
11949 | There may well be powers in things, with which we are quite unacquainted [Hume] |
11950 | We have no idea of powers, because we have no impressions of them [Hume] |
11941 | The distinction between a power and its exercise is entirely frivolous [Hume] |
11098 | Momentary impressions are wrongly identified with one another on the basis of resemblance [Hume, by Quine] |
7954 | If we see a resemblance among objects, we apply the same name to them, despite their differences [Hume] |
21293 | Individuation is only seeing that a thing is stable and continuous over time [Hume] |
12280 | Genus gives the essence better than the differentiae do [Aristotle] |
12048 | The only meaning we have for substance is a collection of qualities [Hume] |
13424 | Aristotelians propose accidents supported by substance, but they don't understand either of them [Hume] |
16058 | Dion and Theon coexist, but Theon lacks a foot. If Dion loses a foot, he ousts Theon? [Chrysippus, by Philo of Alexandria] |
13269 | In the case of a house the parts can exist without the whole, so parts are not the whole [Aristotle] |
12284 | Everything that is has one single essence [Aristotle] |
12262 | An 'idion' belongs uniquely to a thing, but is not part of its essence [Aristotle] |
21300 | A change more obviously destroys an identity if it is quick and observed [Hume] |
21299 | Changing a part can change the whole, not absolutely, but by its proportion of the whole [Hume] |
16059 | Change of matter doesn't destroy identity - in Dion and Theon change is a condition of identity [Chrysippus, by Long/Sedley] |
1330 | If a republic can retain identity through many changes, so can an individual [Hume] |
1321 | If identity survives change or interruption, then resemblance, contiguity or causation must unite the parts of it [Hume] |
21302 | If a ruined church is rebuilt, its relation to its parish makes it the same church [Hume] |
21303 | We accept the identity of a river through change, because it is the river's nature [Hume] |
21301 | The purpose of the ship makes it the same one through all variations [Hume] |
12290 | Destruction is dissolution of essence [Aristotle] |
12286 | If two things are the same, they must have the same source and origin [Aristotle] |
21290 | Multiple objects cannot convey identity, because we see them as different [Hume] |
1207 | Both number and unity are incompatible with the relation of identity [Hume] |
21289 | 'An object is the same with itself' is meaningless; it expresses unity, not identity [Hume] |
21292 | Saying an object is the same with itself is only meaningful over a period of time [Hume] |
12266 | 'Same' is mainly for names or definitions, but also for propria, and for accidents [Aristotle] |
12287 | Two identical things have the same accidents, they are the same; if the accidents differ, they're different [Aristotle] |
12288 | Numerical sameness and generic sameness are not the same [Aristotle] |
12259 | Reasoning is when some results follow necessarily from certain claims [Aristotle] |
9428 | Nothing we clearly imagine is absolutely impossible [Hume] |
4766 | Necessity only exists in the mind, and not in objects [Hume] |
6526 | Hume says objects are not a construction, but an imaginative leap [Hume, by Robinson,H] |
6489 | Associationism results from having to explain intentionality just with sense-data [Robinson,H on Hume] |
6182 | Even Hume didn't include mathematics in his empiricism [Hume, by Kant] |
12417 | Mathematicians only accept their own proofs when everyone confims them [Hume] |
5548 | Hume became a total sceptic, because he believed that reason was a deception [Hume, by Kant] |
12271 | Induction is the progress from particulars to universals [Aristotle] |
7446 | The idea of inductive evidence, around 1660, made Hume's problem possible [Hume, by Hacking] |
12293 | We say 'so in cases of this kind', but how do you decide what is 'of this kind'? [Aristotle] |
1875 | Dogs show reason in decisions made by elimination [Chrysippus, by Sext.Empiricus] |
21806 | Memory, senses and understanding are all founded on the imagination [Hume] |
3819 | Hume's 'bundle' won't distinguish one mind with ten experiences from ten minds [Searle on Hume] |
1317 | A person is just a fast-moving bundle of perceptions [Hume] |
1331 | The parts of a person are always linked together by causation [Hume] |
1388 | Hume gives us an interesting sketchy causal theory of personal identity [Perry on Hume] |
21297 | A person is simply a bundle of continually fluctuating perceptions [Hume] |
1316 | Introspection always discovers perceptions, and never a Self without perceptions [Hume] |
1333 | Memory only reveals personal identity, by showing cause and effect [Hume] |
1332 | We use memory to infer personal actions we have since forgotten [Hume] |
21305 | Memory not only reveals identity, but creates it, by producing resemblances [Hume] |
21307 | Who thinks that because you have forgotten an incident you are no longer that person? [Hume] |
21306 | Causation unites our perceptions, by producing, destroying and modifying each other [Hume] |
21294 | A continuous lifelong self must be justified by a single sustained impression, which we don't have [Hume] |
21295 | When I introspect I can only observe my perceptions, and never a self which has them [Hume] |
21298 | We pretend our perceptions are continuous, and imagine a self to fill the gaps [Hume] |
21304 | Identity in the mind is a fiction, like that fiction that plants and animals stay the same [Hume] |
20834 | Chrysippus allows evil to say it is fated, or even that it is rational and natural [Plutarch on Chrysippus] |
20833 | A swerve in the atoms would be unnatural, like scales settling differently for no reason [Chrysippus, by Plutarch] |
20835 | Chrysippus is wrong to believe in non-occurring future possibilities if he is a fatalist [Plutarch on Chrysippus] |
20808 | Everything is fated, either by continuous causes or by a supreme rational principle [Chrysippus, by Diog. Laertius] |
20837 | Fate is an eternal and fixed chain of causal events [Chrysippus] |
20836 | The Lazy Argument responds to fate with 'why bother?', but the bothering is also fated [Chrysippus, by Cicero] |
21679 | When we say events are fated by antecedent causes, do we mean principal or auxiliary causes? [Chrysippus] |
5971 | Destiny is only a predisposing cause, not a sufficient cause [Chrysippus, by Plutarch] |
20787 | A proposition is what can be asserted or denied on its own [Chrysippus] |
20030 | If one event causes another, the two events must be wholly distinct [Hume, by Wilson/Schpall] |
20850 | Passions are judgements; greed thinks money is honorable, and likewise drinking and lust [Chrysippus, by Diog. Laertius] |
6692 | For Hume, practical reason has little force, because we can always modify our desires [Hume, by Graham] |
8257 | Reason alone can never be a motive to any action of the will [Hume] |
22374 | You can only hold people responsible for actions which arise out of their character [Hume] |
20869 | The highest degree of morality performs all that is appropriate, omitting nothing [Chrysippus] |
3044 | Stoics say that beauty and goodness are equivalent and linked [Chrysippus, by Diog. Laertius] |
20838 | Fate initiates general causes, but individual wills and characters dictate what we do [Chrysippus] |
20813 | Human purpose is to contemplate and imitate the cosmos [Chrysippus] |
22382 | We cannot discover vice by studying a wilful murder; that only arises from our own feelings [Hume] |
3045 | Stoics say justice is a part of nature, not just an invented principle [Chrysippus, by Diog. Laertius] |
20774 | Only nature is available to guide action and virtue [Chrysippus] |
4008 | Modern science has destroyed the Platonic synthesis of scientific explanation and morality [Hume, by Taylor,C] |
8067 | The problem of getting to 'ought' from 'is' would also apply in getting to 'owes' or 'needs' [Anscombe on Hume] |
4578 | You can't move from 'is' to 'ought' without giving some explanation or reason for the deduction [Hume] |
20864 | Live in agreement, according to experience of natural events [Chrysippus] |
3650 | Total selfishness is not irrational [Hume] |
5972 | Living happily is nothing but living virtuously [Chrysippus, by Plutarch] |
1777 | Pleasure is not the good, because there are disgraceful pleasures [Chrysippus, by Diog. Laertius] |
5973 | Justice can be preserved if pleasure is a good, but not if it is the goal [Chrysippus, by Plutarch] |
20845 | There are shameful pleasures, and nothing shameful is good, so pleasure is not a good [Chrysippus, by Diog. Laertius] |
5967 | People need nothing except corn and water [Chrysippus, by Plutarch] |
5966 | All virtue is good, but not always praised (as in not lusting after someone ugly) [Chrysippus] |
20855 | Chrysippus says virtue can be lost (though Cleanthes says it is too secure for that) [Chrysippus, by Diog. Laertius] |
5970 | Chrysippus says nothing is blameworthy, as everything conforms with the best nature [Chrysippus, by Plutarch] |
12277 | Friendship is preferable to money, since its excess is preferable [Aristotle] |
12276 | Justice and self-control are better than courage, because they are always useful [Aristotle] |
12275 | We value friendship just for its own sake [Aristotle] |
12281 | Man is intrinsically a civilized animal [Aristotle] |
20842 | Rational animals begin uncorrupted, but externals and companions are bad influences [Chrysippus, by Diog. Laertius] |
20856 | Justice, the law, and right reason are natural and not conventional [Chrysippus, by Diog. Laertius] |
1779 | We don't have obligations to animals as they aren't like us [Chrysippus, by Diog. Laertius] |
20857 | Justice is irrelevant to animals, because they are too unlike us [Chrysippus, by Diog. Laertius] |
20812 | Covers are for shields, and sheaths for swords; likewise, all in the cosmos is for some other thing [Chrysippus] |
21403 | The later Stoics identified the logos with an air-fire compound, called 'pneuma' [Chrysippus, by Long] |
20828 | Fire is a separate element, not formed with others (as was previously believed) [Chrysippus, by Stobaeus] |
5975 | Stoics say earth, air, fire and water are the primary elements [Chrysippus, by Plutarch] |
14301 | We have no good concept of solidity or matter, because accounts of them are all circular [Hume] |
12265 | All water is the same, because of a certain similarity [Aristotle] |
8382 | For Hume a constant conjunction is both necessary and sufficient for causation [Hume, by Crane] |
19274 | Hume seems to presuppose necessary connections between mental events [Kripke on Hume] |
20819 | The past and the future subsist, but only the present exists [Chrysippus, by Plutarch] |
20818 | The present does not exist, so our immediate experience is actually part past and part future [Chrysippus, by Plutarch] |
20821 | Time is continous and infinitely divisible, so there cannot be a wholly present time [Chrysippus, by Stobaeus] |
3048 | Stoics say that God the creator is the perfection of all animals [Chrysippus, by Diog. Laertius] |
20773 | The origin of justice can only be in Zeus, and in nature [Chrysippus] |
5965 | The source of all justice is Zeus and the universal nature [Chrysippus] |
3042 | Stoics teach that law is identical with right reason, which is the will of Zeus [Chrysippus, by Diog. Laertius] |
12278 | 'Being' and 'oneness' are predicated of everything which exists [Aristotle] |
1782 | Stoics teach that God is a unity, variously known as Mind, or Fate, or Jupiter [Chrysippus, by Diog. Laertius] |
21296 | If all of my perceptions were removed by death, nothing more is needed for total annihilation [Hume] |
20830 | Death can't separate soul from body, because incorporeal soul can't unite with body [Chrysippus] |
21404 | There is a rationale in terrible disasters; they are useful to the whole, and make good possible [Chrysippus] |