단언컨대 는 가장 완벽한 물질입니다

• Pronunciation: Dahn-uhn-kuhn-day ~nuhn Gah-jahng Wahn-byuhk-hahn Mool-jeel-eem-nee-dah

This meme gained significant traction in 2013 from a Pantech VEGA IRON commercial featuring actor Lee Byung-hun, where he famously stated, "I assert that metal is the most perfect material." While an earlier VEGA No.6 advertisement also used the phrase "I assert that seeing is the greatest blessing," quoting Helen Keller, the "most perfect material" version had a much greater impact. It enjoyed peak popularity from 2013 to 2014, being widely parodied across various online and offline media, including the IT industry, online game advertisements, and webtoon comments.

"I assert that ~ is the most perfect material" is a phrase used to emphasize that a particular subject or concept is supremely perfect and outstanding. Originally an advertising slogan promoting the metal material of a smartphone, it later evolved to replace 'metal' and 'material' with other words, assertively declaring something as the most perfect in diverse situations. It is primarily used to exaggerate or humorously highlight the excellence of a subject.

This meme was parodied across a very wide range of media, including TV programs, webtoons, games, news articles, and public institution promotional materials. As such, its usage was not limited to a specific age or gender, but rather spread broadly across all generations. It was particularly actively consumed within the trend-sensitive IT industry, online communities, and among gamers, eventually disseminating to all age groups through mass media.

• "I assert that Gangwon education is the most incorruptible education."

• StarCraft 2 e-sports parody: "I assert that Terran is the most perfect race."