Next is the mis-understanding of the term "rated".
Misunderstanding only by those who won't lift a finger to help themselves. Rated clearly means category and class, and where appropriate, a type rating.
An endorsement is not, and has never been, a rating. An endorsement is not necessary to be "rated" in the airplane, helicopter, etc. Category, class, and where appropriate, type, as spelled out in the regulation.
SSDD hit the nail on the head. People hear what they want to hear, and get upset when they don't hear enough of what they want to hear, or hear it in the way they want to hear it.
What we have are lazy pilots who won't lift a finger to educate themselves. Ignorance is no excuse.
But it's very obvious that it is not clear to most people. The test to make that determination is the actual understandability of the language in the working field.
Only when that test is applied agains those who have made an effort to understand. Most are too lazy to do so, and therefore invalidate understanding of the regulation in the field as a legitimate test of it's clarity.
So if I am an ATP I can no longer log PIC flying a C172 under part 91?
There is nothing written in the regulation that might suggest such a thing. You read into it what you want to read into it, hear what you want to hear, and thus fail to understand what is written in plain English.
Often understanding the regulation means understanding more than one sentence at a time. That's your problem in this case.
I would suspect that the vast majority would be quickly able to provide the correct answer.
This is a discussion of facts and points of law. Not what you would "guess."
"I don't understand" or "I don't have the knowledge" is not the definition of unclear.
Well put.