(within, I should say, the confines of this discussion. I'm sure this ground has been trodden more generally by many others before. But few of us, presumably, were there, so...)

[Raak] Well, you're a bit unfair to say that the points I made contradict each other - I don't think there are any universally accepted moral mores, but those which are predominantly accepted can be explained in an evolutionary way. But I don't see that this is backing for your position, or as you put it, "the consequences of right and wrong action are exactly your presumed evolutionary pressures". Seems to me more reasonable to say that "right" and "wrong" are simply words that human beings have learned to apply to actions with such consequences. But if that is so, why should we do "right" and avoid "wrong"? I think this is the problem with the position you're defending, that "right" actions help the doer and "wrong" ones harm him/her. That isn't morality, it's prudence. Prudence means doing what is sensible, essentially, from one's own point of view. Many accounts of "ethics" have really been about this, the most famous being Aristotle's, which is all about how to achieve "eudaimonia" or "happiness". But this isn't what most of us understand by "morality", for two reasons. The first is that prudence often conflicts with what most people would understand as morality. For example, a soldier who throws himself on top of a grenade to save his friends is clearly not acting prudently, but most people would want to say he acts morally. Second, prudence does not have the force of imperative that I was talking about earlier. A moral value is, in some sense, a command. "Murder is wrong" means "Don't murder people!" You can ignore it or disobey it if you want, but the command still demands a response (and this, I think, for rab's benefit, must be part of the definition of a moral statement). By contrast, "If you mug people it will redound against you" isn't a command, it's simply a statement. It's not telling you to do something. What I want from a decent account of moral statements is an explanation of that imperative, and it seems to me that appealing to consequences in this way - or indeed in any way, such as that of utilitarianism - does not do this.

To put that point a slightly different way, moral values can be transgressed, whereas ones of prudence cannot. "Do not murder people" can be obeyed or disobeyed - "Murder will ultimately harm yourself" cannot.

[Projoy] Look at it this way: muggers are literally stealing people's pocket money. How is anyone going to get rich doing that?

[Raak] Whyever not? One mugger doesn't just mug one victim. They do it over and over again, as long as they don't get caught (that's probably the only practical limiting clause). There's also always the possibility they'll hit a minor jackpot, too, of someone who's carrying more than just "pocket money." I would imagine, for instance, that some of us going up to Rugby had a fair amount in cash. (As the guy collecting money for T-shirts, this is more than mere speculation!) Once they've got some money, there's no reason they couldn't invest their ill-gotten gains wisely, either, and make it grow a bit. True, I doubt most muggers are smart enough to know how to do that, but I don't think you can say it's inherently impossible to become rich through it.

[Raak] Oh, and I think you're also ignoring the way they tend to take other things the person has on them, such as credit cards, watches, jewellery, etc. The latter two probably aren't worth very much for most people (let's be honest, most people wear crap), but cards can lead to all kinds of nastily profitable shenanigans.

[Breadmaster] How about the sense of guilt? Doing something you know to be wrong makes you feel guilty. So, to put it another way, if something makes you feel guilty, it's something you feel to be immoral (this can be irrationally so, of course, insofar as any morality can be said to have a rational basis). Obviously, this isn't objective because different people feel guilt for different things.

[Darren] Ok, one can imagine how to make a lot of money at street crime, but I seriously doubt if anyone does. It's just not a real career option for anyone wanting to do more than just live hand to mouth.
[Bm] What is a "should"? What are commands? The moral person would no more thrust his hand into another's pocket than into a nest of vipers. Shoulds and commands are for those who lack insight and must be told what to do. I have not (yet) read Aristotle (is this the Nicomachean Ethics?), but morality as enlightened prudence sounds right to me.

You see - you can prove it, with one of these. You just need to know the wavelength of the light which will tell you where it is on teh spectrum which will (in most cases) be able to be proved to be a certain colour (except for those "No it's yellow" "no it's not it's orange" conversations.)

[st d] Whether you can prove it or not wasn't the point - it was whether you needed to prove it, or indeed whether you even needed to know a proof was possible.

of course - silly me.

[st d] Well done though.

Wow, this moves fast...
Raak] If by the case of Iraq you mean the resistance against the US/British occupation, then I'd agree that they are morally justified (without necessarily meaning that each and every one of the resitance's actions are morally justified). I suspect that's not what you mean though.
I think the core problem here is where you say "That is the key difference between empirical knowledge and moral knowledge: one is demonstrable and the other is not." If moral knowledge is not demonstrable in some way, then how do we learn it, other than by faith? And given that there are lots of possible belief systems, many of which disagree very strongly with each other, how do we distinguish between right and wrong belief systems?

Darren] I still don't see how you can know whether a proof is possible, without knowing how you are testing it.

[Irouléguy] I think we've moved slightly from rulesets to proofs... the thing is, I don't think you need to prove a mapping is anything other then a mapping. It could be totally arbitrary, with no proof possible, but as long as you had a consistent mapping from one category to another, or, as I said above, a subset of one to a subset of the other, then that's sufficient. A ruleset doesn't need to be grounded in the real world to be a ruleset. It can be entirely abstract, but as long as it doesn't contradict itself then that's good enough as far as the logical proposition is concerned.

[Irouléguy] Indeed it wasn't! This may be getting into the stuff of flame wars, but I had in mind (as you no doubt guessed) the removal of Saddam as the moral act, and cannot see any of the resistance "actions" (i.e. suicide bombing, suicide bombing, and suicide bombing) as moral acts, especially given that the resistance is coming from the Sunni minority whose goal is Islamic dictatorship. Which of their actions do you think are morally justified?
       How do we learn morality? Upbringing, practical experience, revelation, and reason applied to those. As someone once put it: "If you get it, it will be in spite of any method. You must have a method."

[Raak] Hm, I don't think I'll bother continuing with this. Nothing you've suggested as an example needs more explanation than simply that humans enact moral (and legal) consequences upon one another according to the collective effect of shared or accumulated beliefs. This is the main reason muggers (nowadays) can have little success (even ignoring the fact that poverty is probably as much a cause of mugging as vice versa). Sure, all this might be the manifestation of some deeper mechanism, but it could just as easily be a bottom-up emergent phenomenon (rab can correct my terminology if I'm using this expression wrongly) that arises out of our brain chemistry and its interactions with the environment etc. etc. From what we know, this seems to me the most conservative and most available explanation. Why invoke absolute good, absolute evil? It still seems to me that you might as well invoke God. Certainly the notion of absolute good and evil, once you start trying to define them to the letter (in the case of say, the actions of Iraq's invaders and Iraq's resistance), admit of as many conceptual problems as the notion of God. Unless you can tell us more about the reasons for your willingness to entertain your leap of faith (and you've said you can't), I feel we're really just pushing words around.

[rab] Good idea re defining morality. We could take our pick from the 11 definitions, some claimed obsolete, offered by the OED. The ones it thinks are current are:

• Moral virtue; behaviour conforming to moral law or accepted moral standards, esp. in relation to sexual matters; personal qualities judged to be good.
• Moral discourse or instruction; a moral lesson or exhortation. Also: the action or an act of moralizing.
• Conformity of an idea, practice, etc., to moral law; moral goodness or rightness.
• The quality or fact of being morally right or wrong; the goodness or badness of an action.
• The branch of knowledge concerned with right and wrong conduct, duty, responsibility, etc.; moral philosophy, ethics.
• A particular moral system or outlook; moral thought or conduct in relation to a particular form of activity.

Rather a hazy selection, no?

[Projoy] Quite. I had a think about definitions, came up with one and devised a framework for thinking about this whilst queuing in the bank this morning. Then the teller muttered something about ISAs and it all vanished. Oh dear. I also have more pressing things to worry about, in that I have in two weeks an interview for a job I really, really want and for which I expect the competition to be fierce. So I really need to pull out the stops, so if you don't hear from me it's cos I'm doing my homework.

Not posting on MC sites! Is this moral? :)