Comment by harigov

Well, we do know about evolution, and you can make some inferences about the utility of life and that of our species based on that. Would it be based on partial information? Maybe. The point is - you can give any meaning that you want to your life, but meaning isn't just something that you choose one day and stick to it. Every reason that you make will essentially be bound to this ultimate purpose that you assign yourself to. It takes years of conscious effort before your "choice" reflects your "life".