Truth and morality are just a couple of examples that require judgements by an intelligence. Without an intelligent perceiver truth and morality have no meaning. If a tree falls in the forest and hits a rock is that moral? Without a perceiver is there any releveance to the truth of whether the tree fell or not?
So, to believe in any objective judgment call that requires an intelligent perceiver, you would have to believe in a perceiver that it outside the reality it is perceiving such that it would not be affected by that reality.
I do not believe in the existence of any objective judgement calls that require an intelligent perceiver. Truth and morality are simply arrived at through the subjective processes of one beings brain. The fact that we can craft up laws relating to those things is still not an objective process.
edit: I do believe in an objectively real physical reality through an act of faith. Faith that I am not just a program in a computer, faith that I am not just a brain in a jar.