[lazyman75]

The only way you can objectively judge utility of a human is by ignoring the part that makes us .. us (whatever it is) and look only at the physical part - how much calories you could gain from eating a body, how much energy from burning it, how well it would serve as a emergency flood barrier ...

[Retra]

.. or how well, if placed in a certain places and subjected to certain patterns of radiation and sound energy, there would result a cascade of events such that a human body ends up on the moon.

Objectively, we went to the moon. That's measurable, and that's us. We are entirely physical beings.