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I believe we're not the only place in the universe that has life. Look at it this way:

Let us pretend you were to bet money on the different possible combinations of life in the universe. To do so, we construct a roulette wheel and place all the possibilities on the wheel with one possibility in each pocket (ex. life on Earth only, life on Earth +1 elsewhere, life on Earth +2 elsewhere, etc) and let us just pretend it's a finite number so the wheel could be a closed circle. This question would be like having the first possibility of Earth being the only location with life as have a pocket colored red, while all other possibilities colored black.

Which would of those two would you bet your money on? Would you place your money on the ball stopping on a red or a black pocket?