[adriand]

> If I already have many lifetimes' worth of oxygen for my breathing apparatus, I might have no interest in and place no value upon your stock of oxygen.

And yet, clearly you value oxygen enough to stock up many lifetime's worth of it - a testament to its intrinsic value.

> Maybe the beings in question are some sort of alien life form that live in volcanos and breathe nitrous oxide.

You have no evidence that such beings exist, however - so this is purely hypothetical.

On giving this more thought, however, perhaps objects or substances are too simple to consider from the perspective of intrinsic value. So how about something completely different, such as wisdom? Does wisdom have intrinsic value?

Those who do not value it are not wise, and are therefore not qualified to judge whether or not it has intrinsic value...

[praxeologist]

I stocked up on oxygen in the first place because I had an end—sustaining my own life—and the means for this was, in part, supplying myself with oxygen. Oxygen only ever was considered valuable because of my purposeful human action. It was never valuable "just because" as the concept of "intrinsic value" implies.

You seem to be partially accepting my argument that "intrinsic value" doesn't exist but trying to win by redefining "things having intrinsic value" as "things necessary to sustain human life". Okay, things that humans need to survive are "intrinsically valuable" to that end but that isn't what we're talking about.