The Brewster's Angle story from "Surely You're Joking, Mr. Feynman" is very inspiring.
http://www.feep.org/articles/feynman.html
It was so much inspiring that I realized Feynman did not ask a deeper question to these students:
How do we know the electric field is perpendicular to the incidence plane when the Brewster's condition is matched ?
After all, the question by Feynman illustrated how students sometimes make use of their knowledge.
The question he did not ask is more about
how does science really work.
It might illustrate the naïve and superficial understanding of most posters on this forum.
Therefore, it would be illustrative and instructive to read the answers from those miserabilis posters here.