It seems to me that the only thing you have learned is that Caesar is a salad dressing dude.

10 seconds sound clip from the Bill & Ted's Excellent Adventure movie soundboard.

You can hear this line at 00:06:23 in the Blu-ray version of the movie.

Quote context

[...]

- Hey, guys.

- Mr. Ryan, before you say anything, my distinguished colleague Ted and I wish to express to you our thanks for all the things we have learned in your class.

- And what have you learned?

- We have, uh... We've learned that the world has a great history.

- Yes, and that thanks to great leaders such as Genghis Khan, Joan of Arc, and Socratic Method, the world is full of history.

- It seems to me that the only thing you have learned is that Caesar is a salad dressing dude.

- Bill, Ted, this is really quite simple. You have flunked every section of this class.

- Now unless you get an A-plus on your final oral report tomorrow, guys, I have no choice but to flunk the both of you.

- Now you know your topics, so I would suggest that you at least cover those areas if you want to pass the course. Understand?

- Yes, sir.

[...]