We simply don't believe anything that is not logical.
the funny thing is that logically, we shouldn't believe anything. the entire scope of human knowledge is tainted by subjective human perception -- meaning that we cannot obtain truth. we can only obtain what we perceive to be true. there can be no objective knowledge.
the answer? nihilism, of course.
whoa.
mind=blown. never thought about it like that, but it's sort of true -- how the hell can we really "know" anything, if our senses are not truly objective? interesting take. is that really what nihilism is?
Logic soundly shows us that that which is "objective" is fundamentally inseparable from the abstract theories/models we create about it. In other words, it's ultimately not true that we can't really know anything. Consider, for example, that even calling something "objective" is itself an abstract theory of what constitutes objective.