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It depends on the concept of space and time.

Now there are many cases of which I'll explain 2.

case 1: Space and time are infinite and they have no beginning and end.

In this case aliens do exist. There is no question of them not existing. But they may be very far away. Too far away for us to ever know. It's math.

Case 2: Space and time have a beginning and are limited.

In this case they may or may not exist because the chances of conditions being suitable for living (like on earth) on other planets have decreased from infinite to limited.

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13y ago

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