Activities like cooking, grocery shopping, email, texting, and social media do not require the intense focus associated with ultradian work blocks for learning or demanding cognitive tasks.

“It's just that a lot of the sorts of demands of our day, including cooking and shopping for groceries, and email, and text messaging, and social media-- a lot of those things don't require intense focus of the sort that I believe Jackson is asking about maximizing, and that I'm referring to when I talk about these ultradian work blocks.”