So this is an argument I'm actually having, silly as it may seem. Can atheism be said to be a property of an individual? His argument is that it the lack of a property is not a property at all. This seems to make little sense to me. The notorious odorlessness and colorlessness of carbon monoxide certainly seem like properties of sorts and from what I've seen on SEP "atheism" certainly seems to meet many of the criteria mentioned, such as that it can be predicated on individuals. What is your stance on this issue?