Wheelin in class

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.'
Wheelin, who was in the class, from the back of the room piped up in a loud voice, 'Yeah, right.'

See even professors can be wrong but then thats the Australian Language for you

Always said I could never learn and become educated enough to speak tautology