The Kornese Room thought experiment
Imagine 2 rule books are internalised: one answers like a young Korean man, the other like an old Chinese woman. The fact man can't translate from Korean or Chinese is irrelevant to whether the virtual people understand their respective languages.
It's a Korean-Chinese—"Kor-nese"—room. Neither of the 2 virutal people understands the other's language and the internalizing man only understands English.
David Cole, 1991.