The discussion centers on the complexities of black hole horizons and Hawking radiation as perceived by different observers. A distant observer cannot see the formation of a black hole's event horizon, while a falling observer experiences crossing it. The participants debate whether an evaporating black hole has a true event horizon or merely an apparent one, with some arguing that the standard models of General Relativity may not adequately describe evaporating black holes. The conversation highlights the incompatibility of eternal black hole models with those that include evaporation, suggesting the need for new metrics to resolve these issues. Overall, the thread emphasizes the ongoing challenges in reconciling theoretical models with the phenomena of black hole evaporation and radiation.