I would like to request armistice (actually, rather, a cease fire) from econometrics. It is being mean to me and manipulating letters (such as E,X,Y,Z,Fs, etc) in very very un-understandable ways. for example:

E(E(xIy) = E(x). Why this is true, I still don't know. There's a law that says it is though and I haven't been arrested yet and i don't want to, so I'll go along with it.

Also, if Y = a +bx +u
and (u I x) = 0

E(Y) somehow becomes a + bE(x). My head hurts.

Something tells me I should have majored in dance or something. At least there's not much to understand and just a lot to have to know how to do. I don't understand anything in economics anymore and I don't understand what to do. I feel as if the entire entabulature of the Parthenon has fallen on my poor head (I am also right now studying art hum. can you tell?). Pain. The architrave hit me twice.