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f1 calls (f2)
f2 calls (f3,f4)
f3 calls nothing
f4 calls f5
f5 calls nothing
my %calls; #has all the function call information
my $length = 3; #the length of function chains
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 (574 votes). Check out past polls.