Assuming there is an "out there" is unwarranted. As Nietzsche famously stated, "God is dead". He didn't mean the Christian god: he meant every objectivist philosophy. There is just the world with us immersed in it. It is not even wrong to attempt to describe the world in objective terms, separate from ourselves.
If there's no truth to the matter of what's out there or how the world is, then I invite you to leave your 10th floor apartment via the window some time. After all, there's nothing out there that makes this dangerous.
Truth cannot be out there—cannot exist independently of the human mind—because sentences cannot so exist, or be out there. The world is out there, but descriptions of the world are not. Only descriptions of the world can be true or false. The world on its own—unaided by the describing activities of humans—cannot.
-- Richard Rorty
The point is not that the world does not behave in consistent ways: the point is that if you assume there is some objective truth 'out there', you are bound to sometimes end up with 'wrong' conclusions, because truth is only in us, because 'truth' is not an attribute that 'what is out there' has.
I'm not advocating abandoning the notion of 'truth'. It's certainly not up for grabs either. I side firmly with the pragmatism of Rorty: I only care about the 'truths' that I think help me and others survive and be happy.
I agree to what you say :). Had pretty much the same line of thinking myself.
Coming from biology: I know our brains are complex machines, and highly skilled and skewed pattern recognizers, and that therefore many things can be explained in terms of subconsciously picking up signals, or just plain coincidence.
Still, some of my experiences (knowing where someone's attention is at, or feeling flow of energy between bodies) seem to suggest that we can experience more than just the input of our five physical sensory organs. And rather than ignoring these more esoteric senses, I try to use them in a practical sense - as a source of information. Maybe I'm making stuff up ;), but so far my life is more fun allowing for the possibility of these esoteric senses to exist, than going for a purely material world.