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Sam Harris has argued on many occasions - the earliest of which I'm aware of being in his book, The End of Faith, as well as later on in The Moral Landscape - that it is (at least theoretically) possible for us to scientifically determine what is good and what is evil. He argues that the only assumption we need to make for science to be able to make this determination is that it's bad for there to be a universe which results in the worst possible outcome for all sentient beings. Upon that foundation, he argues, we can theoretically build an entire scientific discipline of determining what should be done to maximize good (ie. that which is the opposite of the bad defined above) in the universe.

Is this logic flawed in any way? Clearly, this science would be extremely difficult to realize in practice (having to take every ramification in the universe of every action into account?!) - but is it theoretically sound?

Jez
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    Empirical science has nothing to do in moral issues, that's the field of the Philosophy, wich is purely theoretical. There no way to determine if an act is "bad" or "good" by an experiment. What's the worst scenario? It's depends on the philosophical position on what's the good, i.e. quite different between utilitarism, existencialism and estoicism. – Apocatastasis Jun 14 '11 at 00:40
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    To define a Bad universe, worst possible outcome must be determined first. What scientific factors can deduce how worse a situation is for a given sentient being ? would the same factors be applicable on next sentient being ? –  Nov 05 '12 at 18:30
  • Even philosophy can't determine "badness"/"goodness". It can only give many possible choices and ideas. – zaa Mar 05 '13 at 23:56
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    Is-Ought problem notwithstanding, we can in practice simply agree on a foundational principle and build rational moral systems ("scientifically determine good and evil") from there. I think the foundational principle is as he states, or more generally, that existence is better than non-existence. We can't really justify this, and that's fine, because as long as we agree we can determine which lifestyle choices amongst us (religious vs non-religious in this case) are more or less likely to uphold this principle. Not all beliefs require logical ("scientific", as Harris terms it) justification. – stoicfury Mar 07 '13 at 06:05
  • btw, is it really philosophy of science (as tagged)? i think it's exactly opposite – Bulat Jun 24 '13 at 17:21
  • I believe it can and I've explained how. See my answer: https://philosophy.stackexchange.com/questions/357/is-it-possible-to-scientifically-determine-good-and-evil/85855#85855 – Dan Bray Sep 08 '21 at 15:56
  • Should we firstly define what is good and evil by some measure? Nature and the natural world is full of constant change and transition, death, birth, rebirth - animals competing for survival - some stronger than others. We are told by naturalists to never interfere with the natural world and its happenings, even though we would like to save that poor animal from the clutches of some vicious beast. Or, is evil a human trait, something emerging from deliberate attempts to cause distress and suffering and to take pleasure from it? Evil is experienced as much as it it done? Is it qualitative? –  Sep 22 '21 at 17:39

12 Answers12

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There is no way to take a non-moral "is" and from that extract a moral "ought". (ref) This separation is usually called "Hume's Law". This has been not only a pretty self-evident, but also generally accepted law within philosophy, but nevertheless it regularly pops up wanna-be philosophers trying to break it and failing.

As science can only concern itself with what is, it can not talk about what ought it is impossible to scientifically determine any moral issue, including god and bad and evil.

More.

Lennart Regebro
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    Downvoted because it arrogantly ("wannabe") ignores the clear majority of metaethicists who are moral realists (some of whom espouse a scientific approach to ethics) and their debate. – Ruben Jun 17 '11 at 18:51
  • @Ruben: I don't ignore them. I say they are wrong. – Lennart Regebro Jun 18 '11 at 05:16
  • @Len Calling those who have a different position wannabes is dismissing them without consideration and therefore tantamount to ignorance in my book. Note that I not necessarily disagree with you (but I think it's not as simple as you put it) or agree with Ayn Rand (haha), but with the way you put this argument forward. Are you calling all moral realists wrong by the way? – Ruben Jun 18 '11 at 11:24
  • @Ruben: No, I considered it, and Ayn Rand is a wannabe. Yes, all those that say that moral propositions are made true by objective features of the world, independent of subjective opinion, are incorrect. – Lennart Regebro Jun 18 '11 at 16:52
  • @Lennart 1. But this is the majority view in academic philosophy. 2. Your plural "wannabes" indicates you don't mean just Ayn Rand. 3. Surely you have not considered many other moral realists. 4. Apparently it's not like you can just throw Hume's law in the ring and expect to be understood to be right (I've tried!). Those moral realists (like Ernst whom I linked) know the is-ought-problem of course and would hardly blink. 5. Again, I don't necessarily disagree with you. – Ruben Jun 19 '11 at 22:09
  • @Ruben: 1. I have a hard time believing that, despite my general disrespect for academic philosophers. :-) 2. Yes. 3. I have. 4. I'm sure loads of people will misunderstand it. You claim a majority of academic philosophers have. 5. Good. :-) – Lennart Regebro Jun 20 '11 at 05:07
  • You'll have to. 3. Then you must know that you need to get your epistemological premises straight. 5. No, not good at all. If you're right for the wrong reasons, how can that satisfy you?
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    @Lennart I'll leave this be for now, because this space isn't intended for prolonged discussions and I don't think I need to argue against ad hominem attacks on a substantial part of the scientific community. I hope you've sufficiently embarrassed yourself, so others will be shamed into thinking a little longer. I think it's sad that this is the accepted answer to a potentially interesting question which was prematurely closed. – Ruben Jun 22 '11 at 18:02
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    -1 for using Hume's law in this context. The claim that moral realism is impossible not because of the contents of a particular argument but "because Hume said so" is just ancestor worship. – philosodad Jul 10 '12 at 19:23
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    @philosodad: The argument is not "because Hume said so". The argument is Hume's law. Whom the law has been named for is completely irrelevant. I even make a short and IMO succinct summary of the argumentation. In fact, I only mention Hume because I say that the law is usually called "Hume's law". How you can get that to be an appeal to authority is beyond logical comprehension. – Lennart Regebro Jul 10 '12 at 19:58
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    @LennartRegebro because Hume's law is not considered universally true among Philosophers and is a matter of opinion, not fact. Therefore, you are dismissing a new argument that may or may not contradict the authority by simply appealing to the--disputed--authority. – philosodad Jul 10 '12 at 21:09
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    @philosodad: The appeal to authority exists only in your imagination. – Lennart Regebro Jul 11 '12 at 05:14
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    @LennartRegebro Your argument is of the form "Authorities say p about x". However, the value of an authority depends on 2 things, one of which is a consensus among experts that the authority is correct. Hume's law is not a consensus view, therefore, your argument is an appeal to an inappropriate authority. Your prior comment (on the OP itself) that this question "was answered definitively in 1739" indicates that it is Hume whom you reference as the authority. Also, you are factually incorrect when you say Hume's law is "generally accepted" in philosophy. It is still a matter of debate. – philosodad Jul 11 '12 at 11:54
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    @philosodad: No, my argument is not in that form. You have neither read my answer, nor my response to you. – Lennart Regebro Jul 12 '12 at 03:57
  • @LennartRegebro If I say "Einstein proved that nothing could travel faster than the speed of light" and provide a succinct summary of why he said so, I am still arguing from authority. That's okay if that authority is considered valid on this topic by consensus. Your authority is not considered valid by experts on the topic, hence your argument is invalid. – philosodad Jul 12 '12 at 12:29
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    @philosodad: My argument is not in that form. You have neither read my answer, nor my response to you. In addition you now claim that making a succinct argument is argument from authority. I suspect that's a position that you, despite it's patent absurdity, you will now continue to defend. – Lennart Regebro Jul 12 '12 at 20:14
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    @LennartRegebro You present a straw man. I argue not that a succinct argument is an argument from authority, I claim that a succinct paraphrase or summary of an expert opinion, with reference to the expert and a claim that the expert's opinion is a consensus opinion among other subject matter experts is an argument from authority. In your case, it is a fallacious appeal to authority because your claim that this is a consensus view in philosophy is a false claim. – philosodad Jul 12 '12 at 20:31
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    @lennartregebro until you read your answer to this question, there is no point to this discussion. – philosodad Jul 12 '12 at 22:32
  • A third possibility is is my reference to Aynd Rand? Are you perhaps one of her religiously devoted fans? Do you get offended by somebody pointing out that she is completely wrong on many basic issues? That is also not my fault, although I'm certainly to blame for bringing it to your attention. I'm sorry if it feels insulting to you when you are wrong. – Lennart Regebro Jul 13 '12 at 07:25
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    -1. Regardless of Hume's Law, the fact that "is != ought" doesn't imply anything about out ability to discern what "ought", under some set of guiding premises. Science doesn't tell us what is, but rather proposes models which describe uniformities in what is. The proposed programme is to identify "how we ought to act" with "what will achieve the best outcome": not to identify what is actually the case about X with what ought to be the case about X, but rather what would actually promote well being with what we should try to achieve (without a common proposition X being modified). – Niel de Beaudrap Oct 31 '12 at 01:43
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    @NieldeBeaudrap: The problem there is that you assume that promoting well being is good. Which you can't scientifically prove. QED. Also, rephrasing "what is" as "what uniformities there are" doesn't change anything. That's just a rewording. Science still can not determine what ought or what we should try to achieve. – Lennart Regebro Oct 31 '12 at 05:59
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    As a general note it is interesting how many there are that clearly want to be able to scientifically prove morality and get upset when you show them that they can't. – Lennart Regebro Oct 31 '12 at 06:01
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    @LennartRegebro: you have missed the point. The proposal is to adopt as a premise (i.e. to assume) that promoting well being is good. This is not philosophically uncontrovertial: I grant that. But it does then open up the possibility of a scientific programme for discovering what "goodness" may consist of in particulars, that is in extension, from this intensional premise which serves as a pragmatic bridge between "ought" and "is". What I am asking to be recognized is that this is the basis for the argument, and not that people are trying to "prove" that well-being is goodness. – Niel de Beaudrap Oct 31 '12 at 12:06
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    What I (very imperfectly) tried to convey concerning "uniformities" is that science concerns what uniformities there seem to be (when we prioritise certain things to measure). "Uniformity" is an attempt to fit things which actually exist to an abstraction. Our scientific models are not the same as the facts, but are merely an attempt to attain a digest of what things are apt to happen -- they are not what is, but what we expect. If we posit that "goodness" is well-being, we may ask what we expect to be supportive of goodness. – Niel de Beaudrap Oct 31 '12 at 12:11
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    As for the remark about upset: I feel that this question was closed and dismissed on the basis of non-sequiturs. In your particular case, I feel that you have argued against the wrong question. If I could convince you to inspect the contents of the question once more, perhaps you might notice that no-one is trying to derive the fact that "goodness" consists of well-being, but that this is a practical proposal from which investigation is meant to start. If you have problems with adopting the premise, then make that argument; no-one is arguing that it is an analytic truth. – Niel de Beaudrap Oct 31 '12 at 12:15
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    @NieldeBeaudrap: If you assume a moral framework that is scientifically measurable, then you can scientifically measure it, yes. But reducing moral good to well being is really only a circular definition, because who defines well being? It's not a measurable concept. – Lennart Regebro Oct 31 '12 at 12:29
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    Also, your introduction of the word "uniformities" is on this level of discussion meaningless. I agree with you, but in normal language you call these uniformities "facts". renaming them doesn't change anything, it's just wordplay. – Lennart Regebro Oct 31 '12 at 12:30
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    @NieldeBeaudrap: After your changes to the question, which in fact extends the question several times, then my answer is clearly to the wrong question. With the original question, I disagree that it is the wrong question I answer. The original question is whether Sam Harris logic was flawed, when he reduces morality to well being and then claims it can be scientifically deduced. My answer shows that indeed, his logic is flawed, because you can't reduce morality to well being. It is also flawed because well being isn't objective and measurable, which I didn't point out. – Lennart Regebro Oct 31 '12 at 12:34
  • "reducing moral good to well being is really only a circular definition, because who defines well being? It's not a measurable concept." You haven't addressed that in your answer; you only refer to Hume's Law and is/ought, whereas this is a specific and deliberate proposals to bridge 'is' and 'ought' by introducing axioms to do so (motivated essentially by an appeal to "truthiness", but that's no different from any motivation for an axiom). I only pointed out (perhaps obviously?) that it only makes sense as a proposal for an axiom, and that religious criticism wasn't on-topic. – Niel de Beaudrap Oct 31 '12 at 12:41
  • Physical laws aren't about facts when they concern counterfactuals or other events which have not yet happened, and are subject to our attempts to draw boundaries. My point is that our knee-jerk reaction to call them 'facts' is akin to the knee-jerk reaction to call well-being 'goodness'. Rejecting the idea that any particular choice of 'well-being' gives rise to a meaningful study of ethics is akin to me to rejecting the study of chemistry because chemical bonding comes in a wide variety of strengths so that we could not know where to draw the line for belonging to a specific chemical or not. – Niel de Beaudrap Oct 31 '12 at 12:53
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    I haven't addressed that in my answer, because it is not in the question. I answered the question, not your changes, which I rolled back since it made it into a completely different question. I tried to address some of it in comments here, but that just made you repeat yourself. If you want to discuss something else than the question and my answer to it, perhaps start a new question? – Lennart Regebro Mar 15 '13 at 19:08
  • I disagree. I believe science can explain good and evil, although it's better to use "goodless" or "ungood" to describe evil because the opposite of good is not wickedness, but a lack of good. See my answer https://philosophy.stackexchange.com/questions/357/is-it-possible-to-scientifically-determine-good-and-evil/85855#85855 – Dan Bray Sep 08 '21 at 16:19
  • The citations provided of multiple philosophers who hold by moral realism refutes this claim in the answer: "This has been not only a pretty self-evident, but also generally accepted law within philosophy". The claim about philosophical consensus false. – Dcleve Sep 08 '21 at 18:43
  • @DanBray OK, fine, you disagree, then prove your case and become the most famous philosopher in all time: The one who can objectively prove what is the good action to do an each point. No? You can't prove that? Then stop disagreeing. – Lennart Regebro Sep 19 '21 at 05:09
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    @Dcleve I do not know why you think moral realists claim to have solved the Is-Ought-Problem. The claim of consensus is not false. – Lennart Regebro Sep 19 '21 at 05:16
  • @LennartRegebro -- Moral realism is the premise that "ought" questions are also "is" questions, and therefore there is no "is-ought problem". Moral realism is therefore a rejection of Hume's Law. . As moral realism is the majority position among philosophers, which you yourself already know as you have been pointed to the surveys of philosophic thinking, your claim of a "consensus" for Hume's Law is simply false. – Dcleve Sep 19 '21 at 18:55
  • @LennartRegebro -- and you KNOW your consensus claim is false! In your second post in the comments, you assert that most philosophers are "wrong" on this subject. Then in a later past, you assert most philosophers are "idiots", for disagreeing with you. Just correct the false claim in your answer! – Dcleve Sep 19 '21 at 18:58
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    @Dcleve You have misunderstood moral realism if you think it says that you can deduce moral conclusions from non-moral statements. Moral realism says that moral statements refer to reality. For example, "John promised to clean the kitchen. That means John ought to clean the kitchen". This refers to a fact: John promised to clean the kitchen. But this does not reject the is-ought problem. There's the unstated moral statement there, that one should fulfill ones promises. Moral realism never claims to do away with that and create a fully factual/objective morality. – Lennart Regebro Sep 20 '21 at 19:54
  • @Dcleve https://www.jstor.org/stable/25471868 Quote: "Modern meta-ethics has been conditioned by two dogmas. One comes to us from Hume and is that "is" does not imply "ought". The other is derived from Kant and is that "ought" implies "can". It seems safe to say that these dogmas are accepted, under one interpretation or another, by almost all current theorists of moral philosophy and ethics." End Quote. The article in fact goes on to claim that moral realism can account for these dogmas, while moral anti-realism can not. I rest my case. – Lennart Regebro Sep 20 '21 at 20:03
  • @LennartRegebro -- Two days ago on this site, you had a comment in response to Reuben Jun's link to the survey of philosophic opinions, which showed a majority view for moral realism. Your comment was that you considered most academic philosophers to be idiots. I flagged that comment, as a violation of site rules, and it has now been deleted. Now you deny you even wrote it, and try to gaslight the entire community here about what you wrote???? Nobody else can now see that comment, but it was here for years. – Dcleve Sep 20 '21 at 21:39
  • @LennartRegebro -- unless you are just looking for confirmation bias, one no-name author claiming a consensus exists is not actually demonstration of a consensus. Your view, which you are attempting to claim is consensus, is that there is no matter of fact about moral questions -- that there is an unbridgeable is/ought divide. Most philosophers reject your view, which was shown to you in the philsurvey link. Your effort to redefine moral realism, to pretend that the philosophic rejection is not of YOUR views,, is in direct opposition to its definition in the first line of IEP, quoted next: – Dcleve Sep 20 '21 at 23:33
  • @LennartRegebro -- "Moral Realism: The moral realist contends that there are moral facts, so moral realism is a thesis in ontology, the study of what is." https://iep.utm.edu/moralrea/ This is an explicit statement that what "is" includes "ought", therefore the study of "ought" can be a subject of science. Which contradicts the second clause of the second paragraph of your answer. – Dcleve Sep 20 '21 at 23:43
  • @LennartRegebro Additionally your interpretation of "Hume's Law" is noted as only one of many, in section 5 of the SEP on Hume:. Rather than a consensus, the SEP notes of this passage: "Few passages in Hume’s work have generated more interpretive controversy." Hence you also cannot validly cite Hume's Law and consensus in the same sentence! https://plato.stanford.edu/entries/hume-moral/ – Dcleve Sep 20 '21 at 23:44
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    @Dcleve No, I did not say most academic philosophers are idiots. You simply do not understand what most academic philosophers say, and you also do not understand what I say. And then you apply your own fundamentally flawed logic on your misunderstandings and come to a conclusion that has no similarity to reality. I'm not gaslighting anyone, you are simply completely and utterly incorrect about everything you say. – Lennart Regebro Sep 21 '21 at 05:46
  • Forgive me what sounds like an impertinent question. Truly - what is your intention with the wanna-be classification? You are saying Ayn Rand was not a philosopher. But in what way was she not? She may have been well versed in the history of philosophy - yes this does not mean one is a philosopher because one knows history, so in light of Ayn Rand's status as a 'philosopher' (Wikipedia), why do you seem to claim she was only a wanna-be? Isn't anyone who asks "why" a philosopher? Or do you mean a person trained in a college on the subject of philosophy. Why is Ayn a wanna-be? –  Sep 22 '21 at 17:34
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    She is a wanna-be because nobody in philosophy actually takes her seriously. She is seen as an important philosopher only by her cult-like followers. – Lennart Regebro Sep 22 '21 at 18:35