A chatbot should ideally be able to be formal (or of
whatever style it is intended to emulate) yet unrepetitive/varying in its phrasing. Even if it's not so sophisticated as to continue with some past knowledge of its interactions and at least go somewhere like "As already mentioned, millions of people around the world watched the Moon landing, on July 20, 1969, making it a well-documented historic event."
Even the BBC Basic version of ELIZA that I typed in, back in the early '80s, had the necessary flexibility of phraseology in its limited (but effective, so long as you tried to forget all the data-strings you'd tapped in) range of cut'n'paste responses with occasional insertions. ("> It's my (Mother/Father/Dog)" => ": Tell me about your WHATEVER$." / ": Did you come to me to talk about your WHATEVER$?" / "What is it, about your WHATEVER$, that concerns you?" ...or very roughly like that.)
Top-slot politicians (as alluded to) give themselves very little very variation, because when they do let themselves wander away from the down-pat response to a given prompt they tend to find themselves in a minefield of their own making (as do bottom-slot ones, but with the option of them either then sinking without trace
or riding an unexpected zeitgeist wave upwards), in the face of a determined interviewer, but the AIs can surely develop (and use) a wider range of "prepartee" to avoid
looking so scripted (in the wrong sense).
It's certainly necessary to overcome the obvious suspicions of a correspondant in a Turing Test scenario. And, for that, a vital metric for the combative counterpart of any Generative Adversarial Network to itself develop the detection of (for downgrading insufficient variability and thus promote the alternative), long before it gets to the point of release to the public.
(PS, after I wrote that (and started looking for the actual BBC Basic version of ELIZA) I came across
this blogpost that combined the politician and my own Eliza-nostalgia in one! Probably was a related (but converted) port of the micro-Eliza!
)