The 'Everyone is 12 Now' theory and the 'Of Course You Do, You're 12' catchphrase originated on social media, particularly X/Twitter, to describe the sensation that online discourse is increasingly dominated by children or individuals with extremely naive perspectives. The specific phrase often serves as a dismissive yet humorous 'shut-down' to an argument that feels immature or lacks historical context. It gained massive traction as a way to cope with seemingly endless bad takes, suggesting that the person on the other end isn't necessarily malicious, but simply lacks the life experience to know better. It perfectly encapsulates the generational divide and the chaotic, youthful energy of modern internet arguments.