Brian Manning Delaney wrote,
>> I don't see that the rarity of intelligent
>> life lowers the risk that we'll self-annihilate.
>Moi, I just meant that it increases the probability that the
>apparent absence of aliens has causes that aren't the
>self-annihilation of technical cultures, ergo....
If the absence of aliens is only "apparent" then it neither confirms nor contradicts speculation about possible causes of absence.