[offtopic]
This is a pretty strong approach (and one I have embraced up to a point), but unfortunately there are some... issues.
...
objectivity is impossible.
...many problems due to Heisenberg's Principle too (which cannot be as easily handwaved). Basically, when you define what is "real" to everybody you stumble upon the fact that the reality you perceive and "live in" may or may not be the same perceived (and thus "lived in") by other people.
[/offtopic]
I don't think this is really all that off topic. It's at least tangentially related. If objective truth and certainty are important things, this has some bearing on whether God's existence matters, or at least whether knowledge of God's nature of the kind that religions claim to have is important.
We don't require objective truth or certainty, so issues like the Uncertainty Principle aren't really that big of a deal. We can still understand each other even though we don't mean exactly the same thing. We can still launch rockets into space based on very specific calculations. It would be nice if communication were perfect and we had access to certain knowledge, but it's not necessary. In many cases we can approximate way better than we would ever need anyway.
