Oh no, I completely understand the situation and it makes sense for Vulkan to act the way he does. I just think it is such a weak gimmick that storytellers abuse these days as a "reset button." I just believe there were sooooo many possible avenues to explore that would have been much more intriguing then amnesia... Especially for such a prominent character as a Primarch, and double on the fact that its a Primarch until just RECENTLY was completely missing and unknown about post-Isstvan V. Just poor decision making when it came to fleshing out his character arc.Remember, Vulkan is broken, insane and not thinking. He is focused on hitting Kurze. His tactics and most of his skill have gone right out the window and he is lumbering around charging like a mad bull.