Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-4080775-20200409015842

Beyond the miniscule chakra he had left for Kirin, he literally had no more usable chakra left. So Itachi was right, Sasuke had no chakra left. It's not hard to see he was generalizing how much chakra Sasuke had left.

If i say you have no chakra left, I'm obviously generalizing because without any chakra, you'd be dead. It can easily be interpreted as your chakra is extremely low or that you have no more chakra that can be used for techniques.