Edge.org presents things as 'conversations' but they are generally just essays, with no possibility for other edge members to leave comments. Thats not a conversation. There's no dialogue, nothing anyone says is challenged. None of these 'great minds' at Edge are actually presented talking to each other. Consequently although Edge.org says its all about conversation and advancing knowledge, I suspect its really just…
This event is put under the site's conversations section, and a quick perusal of this section reveals tons of similar conversations with multiple contributors all responding to each other, and they've been doing this for years.