My take on it is this.

Its like the monkeys and the typewriters. You know, odds are a million monkeys on a million typewriters will produce at some point the entire works of Shakespeare. Of course the logical conclusion from that is that they would no doubt produce lesser authors like Tom Clancy and    Ann Rice at a much higher rate. Imagine how many times they would produce "Johnathon Livingston Seagull" or the words to "Bo Diddly" or "Louie Louie".

Think of the odds of them typing any English sentence as the odds of a universe of trillions upon trillions of other planets evolving sapient life. Since form follows function, think of the odds of them producing some work you recognize as the odds for humanoid life. But the odds of HUMAN life evolving here and on another planet would be on a par with the monkeys typing out the complete works of Shakespeare, the OED and the King James Bible, three times in a row.