[xorbie]

There is of course valtaherra's line of objection, but I find it to be patently absurd. Anyone who believes that any person (even themselves) always knows what is best for themselves is simply deceiving themselves. People ask for advice... this every day activity is precisely a demonstration of this. Drug addicts who can't (although you can argue about "can't" here, simply put "don't") clearly don't act in their own self-interest.

That is to say, we are both aware of the limitations of our knowledge about what is the best course of action (asking advice) and often unable to act even when cognizant of this course of action (i.e. addicts).