So you choose to buy and eat that ice-cream even thou it would have consequences after. This just means your desire for that food was greater then any future consequence you were aware of. Good or bad doesn't factor into this valuation. Even if it did, there wouldn't be a way to determine what is good or bad, as there is no such thing as objective purpose in the world.

Due to your knowledge of the unhealthy consequences of ice-cream, this will likely reduce your valuation of the good. Maybe to the point where you would only eat it if it was free.

Therefore the market will reach an equilibrium providing ice-cream to the Curtis's of the world that eat it even if they know it's unhealthy for them. This doesn't mean ice-cream is being over supplied. The market 'sees' your desire for the ice-cream is greater then your concerns about your health, and attempts to meet that demand. Good or bad is just someone else's opinion.

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I understand your position here, but I still have to disagree. You smuggled in a value-laden concept in the second paragraph: "unhealthy."

"Due to your knowledge of the unhealthy consequences of ice-cream, this will likely reduce your valuation of the good."

"Knowledge of the unhealthy"

=

Knowledge of a negative

Without objective value, what differentiates health and unhealth?

Perhaps by "knowledge" you are referring to a mere opinion or preference, but it sounds like you don't mean that. It sounds like you are talking about knowledge of an objective fact.

It makes no difference. The important thing here is you see it as unhealthy, or what ever you mean by 'not good for you'. We are talking about value theory, not whether knowledge of the reality is possible.

But yeah, the important thing, as you have identified, is *you* see it as an unhealthy choice, not that it's possibly an objectively unhealthy choice.