Your comments on the lesson from the page

Regarding what the Rabbi wrote to me:
“First of all, thank you for the comments.
1. Regarding Man Danfah, many have already stated this. Mondschein found its source in the Book of the Reed:
http://www.haoros.com/Archive/index.asp?kovetz=770&cat=7&haoro=0
2. The source of the blessings for eating before prayer is known, but it is difficult to see this as a real source. Simply put, this is a reference to the Bible. But Maimonides in the ninth root means that this is a complete study and not from the Torah.
3. Indeed, the words of the Mishnah in this regard are true.
4. A complete answer is indeed opposed to a reply in his old age. And yet he begins by defining a complete answer, and only later brings up that there is an incomplete answer. And perhaps his intention is to define what I called the great answer. And if he does so in his old age, there is no real revolution here, and there is no such complete answer.
“Shabbat Shalom and Happy New Year,”

I would like to ask a slightly rude question…
Regarding your knowledge, and I’ll take the first question as an example – did you know about this subject and the aforementioned article in advance, or did you check it after the question?
I’m just curious how a person gained so much knowledge (I used an example, but I see it throughout the articles and the lesson).

Sorry in advance,
thanks