That is not always the case. Sometimes it quite simply *IS* the fault of the reader. Readers bring their own mindset to the conversation, so their comprehension can skew even the most impeccably crafted sentence. I can think of dozens of online discussions that I have read or been a part of in which one party has clearly not read the stuff that the other party has written.

That said, *MOST* of the time, the author failed to make him or her self clear. That does not mean that all communications faults are caused by unclear message...sometimes the receiver needs work.