Oh, yes, and atheism is an indisputable fact. There are people who actually don't believe there is a god. Atheists exist.
What you really mean is that I'm pretty certain there is no god. Well, yes. I've had a lifetime to figure that out.
For the record, there is a correlation between the more highly intelligent and the more educated you are, the more you don't believe in god. And the opposite is also true.
Another correlation is, if you live in a country where there is no good welfare system, the country also tends to believe in gods. The better the welfare system, the less belief there is in god. In northern and western Europe there is little belief in god.