The rapidly advancing world of artificial intelligence has garnered equal parts praise and fear from the world at large as we move toward the possibilities of a utopian Jetsons-esque society and/or a robot-induced apocalypse. However, another byproduct of AI has emerged that might scare the stoners a bit: smartphones that know when you’re high.
how does it distinguish from sleepy, distracted, careful thinking on an important message etc?
We don’t know exactly. That’s why it’s called machine learning.
But we do know that it doesn’t do it well, 67% accuracy can be achieved by guessing if you try often enough.