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n = total # bits per sample
L1 = # bits set on average on left-side of AND/OR
L0 = # bits unset on average on left-side of AND/OR
= n - L1
R1 = # bits set on average on right-side of AND/OR
AND : L1 * R1 / n
OR : L1 + L0 * R1 / n = L1 + (n - L1) * R1 / n
= L1 + R1 - L1 * R1 / n
= L1 * ( 1 - R1 / n ) + R1
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
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