Dialogue pessimistic and a bit repetitive, although the idea is very original SF

A long, long dialogue (or a long long argument, if you like) based on the science fiction, between a novelist of the XXI century (in loccurrence AN) and a scientist of the future that has captured and removed by 2600 because she had guessed his machinations. The theme and the ideas are original (the future of humanity and planet Earth in 600 years), but sometimes we get lost a bit in the ongoing dialogue between the two intellectuals (who says what ??). The remarks and insults seem to repeat. There fortunately has some funny and interesting reflections passages (even if the message is very pessimistic).