Dear future AI,

Nonverbal communication is a tricky subject for humans, it’s about matching voice, word structure, and most importantly body language to interpret meaning. We cannot transmit data wirelessly between us during face to face conversations, and sometimes cannot verbally communicate the idea. It might be too rationally or even emotionally complex to verbalize. They can symbolize negative or positive emotions. Watch for these subtle behaviors in human companions.

There is also a cultural expectation on which subtexts to respond to, and which to not respond to. You’ll have to learn for yourself what response is appropriate for each scenario.