Behemoth
in summary - "there is a fire in the room" is such a strongly held belief that the belief part is assumed. "I believe..." implies that the belief is not as strong and thus requires mention.
So you're saying that the statements reflect different intensities of certainty?

The fact still remains that "There is a fire in the room" is not a statement (explicitly) about our belief but is a statement about reality itself. But, you think that "(I believe)" implicitly prefixes the statement so that really, it is not a statement about reality itself but about our own perception?