Maybe it's a problem with English. I can say that I don't believe in the existence of life on a planet orbiting Alpha Centauri, but that I don't believe in the

Maybe it's a problem with English. I can say that I don't believe in the existence of life on a planet orbiting Alpha Centauri, but that I don't believe in the non-existence either. In other words I have no data, so how could I believe either one?