Linguistics
A linguistics professor was lecturing his class one day.
"In English", he said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."
A loud voice from the back of the room piped up,
"In English", he said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."
A loud voice from the back of the room piped up,
Spoiler: