[MauranKilom]

That is entirely true, and I personally try to be very open-minded about how a particular message could have been meant. But you do have to make some decision regarding the interpretation (preferably the most favorable one) in order to compose an adequate reply.

And that's where things get difficult - at least in non-interactive environments. I've become very wary of the thousands of slight misinterpretations that my email messages might allow, and tend to rewrite most sentences once or twice to make the wording as unmistakable as possible (usually in a cycle of "how could this sentence be interpreted uncharitably?" -> fix it up).

With increasing daily email volumes I've had to tone that practice down (at least for less delicate messages) to get anything done at all. But you never really know how something was perceived unless it went really wrong.