You need to swallow your pride and ask him.
Many times you ask appropriately what something from a published article, something on line means.
However, why do you ask people to play guessing games as to what a person who is right here is asking, when that person is available to answer.
In fact, you don't need to PM.
If you read something on a thread you don't understand the meaning of, quote that person right in that thread, asking them what they meant. You would be getting the information right from the horses mouth.
There is no need to start a totally different thread, that doesn't show the context of the entire conversation, because you don't understand something.
For instance, if you didn't understand what the phrase "from the horses mouth" meant, why would you go start an entirely different thread, when you could just ask me right here?
You overcomplicate things when you just don't ask the person who can directly give you the info.
The native speakers here aren't saying "who cares what he says"