One easy way to identify public experts from mere experts?
Public experts always finish early.
Public experts know how to use beginnings and endings to make memories in their audiences — even if they have only 30 seconds.
But first: They stay inside those 30 seconds. Or 100 words, if that’s the word limit.
They cultivate a brevity habit.
Recall all the experts you’ve seen blow through a moderator request to be brief as if they hadn’t heard the request at all.
They can’t be bothered to select what’s crucial and concisely convey it.
Then again, they have made a memory.