In this system, I know that any source with notes attached is at Layer 1, any bolded parts indicate Layer 2, and any highlights indicate Layer 3. As long as I stay consistent with this much simpler and more natural system, I’ll know how much thinking has been done at any point in the future. Evernote gives us a second brain by allowing us to distribute our thinking across two brains, instead of one. It doesn’t matter that this second brain is nowhere near as smart as your original one — by
