ever to have been the case
1. Does the following sentence mean: In spite of Andrew Merrifield denying it, Guy Debord seems to have been influenced by Lefebvre's ideas?
2. Does "latter" refer to "Lefebvre", meaning that "Merrifield in his creatical statements on Lefebvre has pointed out such a thing" or does it refer to something else in the previous paragraphs in the original text?
Guy Debord supposedly studied under Lefebvre, although Andrew Merrifield denies this ever to have been the case in his critical portrait of the latter.