Notes on "Usage of dates argument in a row context" by Marco Russo

Marco Russo recently blogged about the usage of dates arguments in a row context. The measure he presents as producing "wrong results", actually produces the results I expected. For this reason, I had a hard time understanding the motivation behind his article and decided to write a follow-up in case anyone else missed his very subtle explanations about context in DAX expression. If you have not done it yet, I recommend you read his entry, before and/or after reading mine.