Eleatic Stranger said:
Um, and you have critically examined the categorical imperative and how it's deduced from the nature of practical reason?
Frankly, no, no it isn't. And this brings out the point that I made much earlier, which is that it's sometimes hard to see the difference between Rand and other philosophers if all you have is the basic intro-philosophy level summaries of what they've said.
Wow, have a large ego, do we? I have not, in fact, read Kant's formulation of that imperative. Why should I? What matters is the result, and how it is useful to me. I don't care how you formulated your mathemematical theory... if it doesn't work, it's not useful. In the end, you still have to check the results of your thought against reality, and Kant fails in my opinion.
Kant's categorical imperative:
Act only according to that maxim by which you can at the same time will that it should become a universal law.
Now, many murderers and thugs on the street think that you should survive on your own merit, murder is not wrong, and they expect others to try and murder them. It's part of the game. And this is right? They should act this way? They would will that it should become a universal law... whether rationally in their self-interest or not.
Then we get into the question of the particular situation. Were my wife raped, I would probably want to kill the rapist, and at the same time, would probably will that that become a universal law. Every situation is also different, and they all have mitigating circumstances, so much so that the imperative becomes trite and useless.
The problem with the imperative is that everyone wants to make the world in their own image of how they think it should be. Everyone has a huge amount of ego that they are right, and that the world would be a better place if everyone followed their morality. Therefore, whatever I wish to do, I would wish it to become a univeral law, if I am honest with myself, because I think I am *right*!
Ayn Rand probably wishes her morality be a universal law. Does that mean she should follow it and it is moral? Fundamentalists "know" they are right, and would wish that the entire world followed their morality. Does this make them right? It would seem Kant says they should kill homosexuals, in fact demands it if they wish that everyone would do the same.
The categorical imperative only makes moral sense as an absolute if you have the axiom that self-interest as the motivator and arbiter of what you wish to do. Otherwise it is chaos.
And why ought one to pursue their own survival or self interest? Even if it is a fact that they do so - or even do so necessarily that doesn't show much about whether or not they ought to. Specifically, it doesn't unless you allow in some other premises. You can't, in other words, deduce that you ought to p from premises that don't themselves contain some form of an ought statement - even if that's as minimal as "you ought to do what advances your own interests". Basically though, yes, if one has facts and a goal then one can deduce, possibly, an ought statement - because that's the sort of statement a statement of a goal is as well. The argument, however, was directed at the notion of deducing an ought from an is.
Because if one does not, one ceases to exist. If you want X, you ought to do Y. However, by the very fact you exist, you wish to keep existing (in general)... call it inertia of existence. You can produce oughts from future statements of intent. There is no "ought" to the goal of survival and self-interest... you do it because you exist, and if you did not have the goal of self-interest, you would not exist, and would not be able to act anyway. This is a goal implicit in the fact that you exist.
I think you would do well to actually read Hume carefully before dismissing his argument as facile - it's a fairly significant one and liable to be misconstrued.
What really confuses me, though, is that above you sound like you're saying that the only real sort of oughts there are are instrumental oughts (if one has goal x and means y are the means to x then one ought to y) - but these are precisely all that Hume allowed for. In fact, it was his entire picture of how reasoning worked in the first place. So I'm really entirely unsure of what you're disagreeing with at all.
I am sure it is quite subtle and beautiful. Unfortunately, he is missing an important point... and one that is grounded in reality which he conveniently ignores, and is one of the simplest possible.
I am disagreeing (perhaps not in the same style as Rand, I am still reading) that an is can't produce an ought, because the goal of self-survival and self-interest is a fact. You exist. This has the implicit goal of self-interest, or you would not exist. It is built in. The goal is not a rational one, it is a necessary one. Those are "ises", and from that implicitly comes the ought of self-interest, because goal becomes fact.