"This is a writing about fiction-reality, or reality-fiction." I have heard this style of writing deemed "Faction" (a mixture of fact and fiction). IMHO, the post is indeed a writing post, it just involves a child's perception of his father's mathematical mode of thinking and the application of that thinking upon the reality of the world. Also, it is stated as an excerpt from a book in progress. Although, the manner in which it was presented, to me, could use some further development and "cleaning up". (Ie, In most writings, the underscore character is rarely if ever used and, to my knowledge, the underscore does not have a literary meaning to it.)