The equation is a collection of undefined variables, so the answer you end up with is determined by the assumptions/approximations you're using. If you think planet formation is constant across all of the universe and then put your guess for that number in, sure there's no aliens.
Basically, the equation is tricky confirmation bias. Make conservative (read: ignorant) postulations, and you'll get a conservative estimate of alien life. The Drake equation isn't necessarily incorrect, we just don't have the hard information needed for the equation to be useful or accurate.
Basically, the equation is tricky confirmation bias. Make conservative (read: ignorant) postulations, and you'll get a conservative estimate of alien life. The Drake equation isn't necessarily incorrect, we just don't have the hard information needed for the equation to be useful or accurate.
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