#pretchat is using a service known as Nurph for archiving all chats. You can replay the chats using Nurph's "View Replay" button located on each chat's homepage. Just click on the chat title that interests you and find the blue "View Replay" button in the middle of the page. Once the replay begins, you can adjust the speed using a button at the bottom of the display window.
Here you can find an archive of previous chat agendas.
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