presenter: "I can hear my voice coming through the speaker, is it meant to do that?"
me: "yes, that's what they're for."
presenter: "the stage lights are shining in my eyes"
me: "that's because they're pointing at you"
presenter: "can you you point them away from me?"
me: "then they would be illuminating the wall, which sort of defeats the object"
then later, during the conference;
lady in the audience: "in order for our business to become less complicated, we need to become more simple... "
I think some of them are quite simple enough.