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# randomly choose subsets of items from a set, without replacement.
# items in the set are not equally probable.
my @items = choose_items(2, \%weights, $tree);
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 (562 votes). Check out past polls.