(assuming you accept an information-pattern theory of personal identity, you should regard this as good as talking to X in person)
Nope. You have no way of knowing that the thing you are talking to in an accurate simulation of X. All you know is that is something that said one line that could come from X, keeping in mind that you are probably biased on the subject due to the emotional charge.
Nope. You have no way of knowing that the thing you are talking to in an accurate simulation of X. All you know is that is something that said one line that could come from X, keeping in mind that you are probably biased on the subject due to the emotional charge.