It's like the author didn't read his own advice, he says > Everyone with functioning eyesight is a visual learner. And also > Eight is the maximum number of

It's like the author didn't read his own advice, he says > Everyone with functioning eyesight is a visual learner. And also > Eight is the maximum number of slides you should give in a talk, whether 20 minutes or 50 minutes. So which one is it ? you want people staring at the same 12 slides over 50 minutes or you want to actually show them something ?