New post: What is mental energy?
[Note: I’ve started a research side project on this question, and it is already obvious to me that this ontology importantly wrong.]
There’s a common phenomenology of “mental energy”. For instance, if I spend a couple of hours thinking hard (maybe doing math), I find it harder to do more mental work afterwards. My thinking may be slower and less productive. And I feel tired, or drained, (mentally, instead of physically).
Mental energy is one of the primary resources that one has to allocate, in doing productive work. In almost... (Read more)(Click to expand thread. ⌘/CTRL+F to Expand All)Cmd/Ctrl F to expand all comments on this post
On Hypothesis 3, the brain may build up waste as a byproduct of its metabolism when it's working harder than normal, just as muscles do. Cleaning up this buildup seems to be one of the functions of sleep. Even brainless animals like jellyfish sleep. They do have neurons though.
I'm mostly going to use this to crosspost links to my blog for less polished thoughts, Musings and Rough Drafts.