Everyone has some degree of obligation to be polite . It ' s not more than the obligation to thank someone who held the door for you . I ' m saying why they should not why they must . EDIT I don ' t know how much of an Apple apologist you have to be to say it wouldn ' t be a courteous move to its fans to give a brief reason why they abandoned the original timeframe . <| sep |> well since you put it like that . <| sep |> rbadmathematics The probleme here is not the notation , the problem is that the author doesn ' t understand anything about random variables or probabilities and treat it as just writing formulas <| sep |> No . Not even in the slightest . <| sep |> Oh man I haven ' t laughed that hard in awhile . <| sep |> 2756 4 miler in my hometown . It was a good way to start the day .