yep. this is part of the skepticism mentioned in the article--I have anxiety, depression, hot/cold flashes, appetite loss, sleep issues, and disgusting night sweats for a few days after I stop heavy use, but am often told it's all in my head. the reality is that our own cannabinoids do all kinds of things for our homeostasis that are not well understood. so asserting categorically that there is no physical withdrawal when you stop flooding your body with external cannabinoids is naive.