"Super fancy autocomplete" may not be that different to us, or at least some substantial part of us. Do you think when you speak colloquially with a friend or a colleague, you are engaging in a deep reasoning exercise? When you speak, the next set of words you utter feels like a 'fancy autocomplete' because you don't think through every word, or even the underlying idea or question that was presented - you just know how to respond and with what set of words and sentences.