We Know Only What We Know

The intuitivists say it's impossible to assume ~A (not-A), and then to entail a couple of contraditory forms as B & ~B (B and not-B), to imply ~~A (double negated A). Since we don't know what negative forms are, we cannot assume something non-existent to entail anything about existence. To entail anything in such a manner - is to get logical truths. If we're limited in logical truths, we don't know anything except of facts. So, the facts are only one thing we're aware of.