I was watching Lord of the Rings, and in the scene where the ork said that Aragorn had fallen off the cliff, Legolas said: "you lie". Why did he say it in the present simple time? Wouldn't the present progressive be more appropriate in that situation?
Some writers use the simple present in places where a contemporary native speaker would use the progressive in order to give the words of their characters a somewhat antique feel. "You're lying" would sound too contemporary, too normal and "everyday".
Ngram isn't always a good indicator of spoken patterns, but you can see from this one that "You lie" spikes in the 17th century.
NOTE: There's a glitch with the apostrophe in that URL. Search 1600-2000 for
You lie, You're lying.