In the Ted Talk, Optical illusions show how we see by Beau Lotto, we are shown how we see with optical illusions. I think Lotto's purpose of this video is to realize the uncertainty of this world. He believes that only way to truly understand Is through uncertainty. He used bee's to represent his thesis. The bee's would get rewarded if the went to the blue flower. He uses blue flowers under green lights so the flowers look green to us but they are actually blue. He uses this to help the audience understand that they are using their senses to solve the puzzle. In his speech he uses an objective tone to talk to his audience causing his points to seem more interesting or correct. He uses his tone to persuade his audience that he a reliable resource