Regarding scripting: Note that scripting is a spectrum, and not an on-off thing. A script can be a single large block of text, read woodenly in a monotonous tone. A good speaker knows how to read a boring block of text, say, for example, some neighborhood land-use zoning laws, and with the right intonation, pauses, and cadence, turn it into a bearable, if not totally entertaining experience. Add just the right facial expressions and gestures and it could even be fun. One can be fully scripted and autonomous at the same time.

An improv script might have responses A, B or C, and the improv actor might take the pre-scripted response A B or C, depending on the audience reaction. The actor has some autonomy, but not “full autonomy” It is comparable to the autonomy of a chatbot, which has written responses A B C, selected in reaction to the current discourse context.

A fleeting conversation with a total stranger is stereotypically about the weather. Or “How ‘bout them Yankees?” These are not exactly fully autonomous conversations either. We’ve all mentally prepared pleasantries that we trot out at socially appropriate settings. They’re polite but scripted things we say, and we use such scripts all the time.

Those times that we do have “unscripted” conversations over a meal or drinks, we still obey the laws of grammar and syntax, and use a vocabulary that the other side understands. Even then, ones freedom is limited; word salad is not on the menu.