But what if I told you that uniqueness is less absolute than deadness?
But.
Is not one of them more unique than the other?
"Uniqueness is absolute."
Yes. And it possesses two absolute uniquenesses.
The other has only one.
The rock that has the same density as one rock and the same color as eight other rocks is still unique. No other rock has that combination in the whole sample.
Would we say this rock is as unique as it would be, if its density were not shared with the other rock?
Maybe there's someone who doesn't like modifiers on "unique" who also doesn't like it when it's used with anything but an entirely open-ended scale.