Lee Soo-geun reacted to musical actor Jung Sang-hoon's remarks about his educational background on JTBC's 'Knowing Bros.'

On the episode featuring guests Jung Sang-hoon, Shin Sung-rok, and Kim Gun-woo, Jung Sang-hoon was introduced as a graduate of Seoul Institute of the Arts, Department of Broadcasting and Entertainment. Lee Sang-min raised his voice at Jung Sang-hoon, who did not recognize him as a senior, and Jung Sang-hoon greeted him, saying, "Class of '96, senior." Lee Sang-min also revealed, "I am also class of '96," but explained the reason they did not know each other was, "I was in the Film Department."

Lee Sang-min mentioned that he was the top of his practical skills at the time but it was revealed that he dropped out during his first year. Jung Sang-hoon also said, "I attended the first year twice and then dropped out." Lee Soo-geun pointed out, "Why do you both not say you are high school graduates?" and asked, "Why do you list Seoul Institute of the Arts as your education? What about those who paid tuition and graduated? Can they join the alumni association?" When Lee Sang-min said, "I also went to festivals," Lee Soo-geun replied, "Anyone can go to festivals."

When Shin Sung-rok was introduced as a graduate of the Department of Theater and Film at Suwon University, he hesitated when asked if he had dropped out. Lee Soo-geun said, "Looks like you are a high school graduate too," emphasizing, "There's nothing shameful about being a high school graduate." Shin Sung-rok said, "Still, I attended for two years. It's a bit much to say I didn't attend at all," and Jung Sang-hoon added, "Anyone can tell Sung-rok must have graduated from college, but he didn't, so I feel betrayed. I look like someone who dropped out," which made everyone laugh.