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( list ) x!! cond
( grep cond, list )
cond ? ( list ) : ()
join '/', grep defined $_, ...
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?
Results (502 votes). Check out past polls.