The 'But You Can't Prove It' meme originates from the hit TV series 'Dexter,' specifically featuring the intense character Sergeant James Doakes, played by Erik King. The scene depicts Doakes confronting the protagonist, Dexter Morgan, expressing his deep-seated suspicion that Dexter is a killer while acknowledging his inability to legally verify it. On the internet, this image captured the public's imagination as the ultimate reaction for situations involving 'gut feelings,' unconfirmed rumors, or obvious but unproven facts. It is widely used in gaming, office politics, and social media debates to playfully or aggressively call someone out when they think they've gotten away with something.