Demonstrated is probably the wrong word. If their behavior is any indicator then I have observed that humans are worthwhile to other humans and many of their pets and also to the animals they eat. Anything beyond this is just conjecture.
Is this not also conjecture? Is it any more veridical than water being meaningful to plants? Than the ground being meaningful to unsupported objects? Surely this observation is based on more than just behavior.
They are observed by the opinion holder and by any observer the opinion holder shares their opinions with. That does not change the fact that without the opinion holder there is no opinion to be observed.
"'I don't understand how a supposedly meaningless universe could spawn meaningful things'
As far as I can tell it did not. I am unaware of any meaning or value that was not assigned or imposed subjectively and artificially by humans" (#91).
So then I asked you if humans are meaningful and to paraphrase you said they are to other humans. But what about those humans? Are they then meaningful to other humans? Who are meaningful to others and others to others? Where does the meaning come from? From humans who are otherwise meaningless?
"'nor do I understand how subjective values are any more made up or artificial than anything else that exists.'
I'm just not sure what you mean by this. An asteroid exists physically an opinion does not exist beyond the opinion holder" (#91).
I meant that opinions are just as "made up" as asteroids, even if they are contingent on an opinion holder.
And before all of that:
"Subjective values give things meaning but they are not real they are made up. They are artificial constructs we use to relate to a meaningless universe" (#87).
What does that say about humans? Supposedly they find each other meaningful.
Explain all you like but without proof of this necessity I may be unable to believe that.
Are subjectivity and objectivity not dichotomous? What are they without the other to contrast?