The chance of a deity existing is less than 50/50

I would like to first talk about something my opponent brought up in the beginning. He said it was not an argument, but it is something I want to address for educational purposes. There is a gland in your brain in between your eyes that releases hormones that sends out mental images and sounds. This is the gland responsible for dreams. Both at a really relaxed state and a really chaotic mental state is when this gland releases the hormones. If you notice these stories, and you compare them to a Jew, Hindu, or Muslim's, you will see that they all have one thing in common: whatever they were taught about their religion is what happened to them. This also explains the reason why when people are clinically pronounced dead, they see these images and sounds, even when no brain activity is recorded. Just because there is no DETECTABLE activity does not mean there is none at all.Now, let me get in to the arguments. When my opponent mentions that there are infinite numbers of things that exist that we don't know about, he is, in my eyes, partially right (notice how I don't come flat out and say he is 'wrong'). There are a number of things that we can't explain, but there isn't anything we claim to exist that we don't know something about. You think you know everything there is to know about a maple leaf, but we can never know too much. Do I support the theory that the universe is an infinite space going on forever? I believe it is most likely, but without knowing for sure, I will never fully claim something as true. If something is infinite, by the way, that would mean that you can't have a percentage of it. You need to have closed, not open ended number figure. Let me talk about the next paragraph.I would find it absurd if someone said that there is no such thing as intelligent life else where in the universe. But, let's think. What if life is a rare occurrence in the universe? It is actually very possible that life may not exist else where, or if it doesn't many other planets. Think about it: There are places on earth that can't support life, so is it absolutely definite that life can exist else where? If the universe is infinite, this does raise possibilities, but the ability to observe a deity adds to it's possibility. Let's look at what a deity is in our minds. A deity is supposed to be not of this universe, and a deity is supposed to have some sort of capability to have some sort of an effect on life on this one earth. If my opponent is right, and the deity is of the universe and is just very distant, what is the possibility that it can effect the earth, and see everything? This is when either magic comes in, which has not been proven to exist, and the possibility of magic being real is very, very slim. Magicians as we know today rely on illusions, not magic.So, how does this make it less likely that a deity exist? Well, in order to claim something as true, you need to have the characteristics of that something to be true. In order to claim the possibility over 50%, at least half of the characteristics have to be proven to be real. If all but one characteristic is proven real, and that one characteristic is proven to be impossible or improbable, then the whole claim is thrown away.