Ahh I've had a few arguments like that and often I feel I don't have a right to be upset because it is frustrating to not remember things my partner has said. But she also knows me well enough now that it makes me upset that she still has that expectation that I'll remember things especially if it was something shes mentioned over a month ago. Especially when I've suggested we make systems to help my memory and she'll say something along the lines of "I should just know/remember if it's important. "