Comment by TheDong

But conversely, if I alt-tabbed to chat with a friend, or paused studying because the person sitting next to me asked a question, or I took a sip from my coffee mug, that doesn't mean it's hard necessarily. Even though all of those take at least as much time as answering a hard card un-interrupted would.

The AI cannot read my mind, there is no approximation that will work reasonably accurately here for "how confident was I in my answer", unless I input that myself.