So, do you believe in aliens?

[saden1]

Originally Posted by 70Chip

This is an important distinction. Can I believe in the existence of aliens without believing in them? I mean, what have they ever done for me?

The following statement is valid in the context of your question but it doesn't make sense at all.

I believe aliens exist.
But I don't believe in aliens.

You can believe in the probability of their existence, that's to say they may or my not exist. To believe is to affirm their existence to be true and that they are real.