I feel like the thing that really gives it away was the flat tonality across comments, humans tend to become more or less verbose in waves, because of moods, so

I feel like the thing that really gives it away was the flat tonality across comments, humans tend to become more or less verbose in waves, because of moods, sometimes they'll post long diatribes and sometimes the energy isnt there and the answers are shorter. those tendencies bunch up across time giving a higher level view of the person. this bot to me, feels "flat" in comparison. it's hard to tell from any one answer but looking at the account posting history as a whole gives it away. I mean that's the general problem AI is constantly being built to overcome (larger and larger collection of smaller successes) so I see that dissapearing as an issue easily down the line but at least for now that stood out for me.