Here is how I would define axiological hedonism:
- Suffering, i.e. any negatively valenced experience, has intrinsic disvalue.
- Pleasure, i.e. any positively valenced experience, has intrinsic value.
- Nothing else has intrinsic value or disvalue.
The core of my take on axiology is that something has intrinsic (dis)value if and only if it literally is valuable. Intuitions are not evidence for intrinsic value.
I am convinced that suffering (and pleasure) fit this criterion. The disvalue of suffering is self-evident from introspection, i.e. from observing how suffering feels. The disvalue is inherent in the experience; it is not a matter of an evaluation done by me, or a desire for the suffering to stop felt by me (even though there is a strong correlation), or me having a certain attitude towards suffering.
That being said, I think a subjective judgment cannot be avoided when it comes to comparison of (different kinds of) suffering and pleasure. In the words of John Stuart Mill:
Neither pains nor pleasures are homogeneous, and pain is always heterogeneous with pleasure. What is there to decide whether a particular pleasure is worth purchasing at the cost of a particular pain, except the feelings and judgment of the experienced? (What Utilitarianism Is)
An experience does not inherently carry information about its commensurability with other experiences, but it does carry the basic information that its value is positive or negative. The basic variant of axiological hedonism is only concerned with the latter.
I reject axiological hedonism. I don't think anything has intrinsic value or intrinsic disvalue. On my preferred view, all value is projected subjectively onto the world, and pleasure is just one way, among multiple, to find something "good". Conscious approval is another way to find something good, for example. Things are only (dis)valuable if they are (dis)valued. I describe this view in this piece, and some more implications here.
Could you elaborate? FWIW, I don't really think anything is self-evident, maybe other than direct logical deductions and applications of definitions.
I would say suffering actually is an evaluation done by you (disliking) and a desire (wanting). The evaluations and desires inherent to suffering are kind of hardwired in, not reason-based. They are not the kind where you decide by reasoning that something is bad and to be avoided. They are forced onto you. These are empirical claims for which I think there is some evidence from cognitive neuroscience. I discuss this more in this piece and this piece.
What I meant is that the disvalue of suffering becomes evident at the moment of experiencing it. Once you know what disvalue is, the next step is figuring out who can experience this disvalue. Given that you and I e.g. have a very similar nervous system, and that we behave similarly in response to noxious stimuli, my subjective probability that you are capable of suffering will be much higher than the probability that a rock can suffer.