You are misquoting yourself. I am replacing all instances of "People should do A if C is true" with "People should do C if A is true" to quote you correctly.
1. It's the same statement. People should do C if A is true.
2. It is not a doctor's job to define an emergency with mathematical precision
Quote (2) from your post proves why quote (1) from your own post is false. The simple statement about A and C does away with irrelevant considerations like what a doctor's job is.
It is every bit the job of the writer of the statement "People should do C if A is true" to define A precisely, or be subject to misinterpretation. If A is vague, the recommendation cannot be denied if some interpretation of A is true for some one.
I am *not* personally recommending that people do C, because I don't *think* A is true.
1. What you think about A is irrelevant, when you write "People should do C if A is true". Telling for the fourth time, the reader evaluates if A is true
If you don't want to recommend people to do C, you can simply write "People should NOT do C". In which case you could have truthfully claimed to not having recommended that people do C..
No I am not. If *some* people think swallowing a watermelon seed is an emergency, the doctor is not telling those people to come to the hospital. The doctor doesn't think swallowing a watermelon seed is an emergency for anybody. It doesn't matter what the patient thinks, he is not recommending anybody come to the hospital for this.
So the analogy has failed when stretched thus far. When applied here, the doctor (you) do have the responsibility to define emergency (A) properly. If you can't wrap your head around that, stick to A and C.
Assuming the reader is a person (i.e. a member fo the group "people") is complicated and deceptive?
No, saying that recommendation is for people belonging to a certain group along with every one else is complicated and deceptive. Because there is a simple and clear way to say that the recommendation is for "all people" or "everyone".
I did until you asked me to clarify if I was talking to the reader or "people", and I decided to not specifically exclude the reader from "people".
I didn't ask you to clarify. "People should do C if A is true." is clearly recommending to people other than reader too.
1. I didn't say everyone.
2. The recommendation *is* for "people", referring to a group to which the reader belongs (along with everyone else).
Quote 2 from your earlier post is for everyone. The part in bold should remove all doubt.
And no I am not saying "when the reader is of an opinion A", I am saying "when A is true"
You seem to not know the meaning of "opinion". When it is a person X's opinion that "A is true", A is true for that person. So for X, his own opinion about A being true is the exact same fact as that of A being true.
To prove this further - imagine a person who thinks his own opinion is false!!!