the only way to end a heated debate when one person continues to repeat a lie in the hopes that the other person will believe it is true.

comes from the ST:TNG episode where Capt. Picard is captured by the Cardassians and subjected to physical and psychological torture to make him believe there are five lights instead of four in the interrogation room.
pundit: "But the GOP hasn't contributed to the national debt!"

expert: "Two unnecessary wars..."

pundit: "But the GOP hasn't contributed to the national debt!"

expert: "Increased military spending..."

pundit: "But the GOP hasn't contributed to the national debt!"

expert: "Tax breaks for the super wealthy..."

pundit: "But the GOP hasn't contributed to the national debt!"

expert: "THERE ARE FOUR LIGHTS!"
by projectaristotle August 29, 2012
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The number of lights that there are, as opposed to five lights. From Star Trek: The Next Generation and also a well-known meme.
"How many lights are there?"

"There... are... four lights!"
by Sajak July 26, 2017
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