A lecture about English
A linguistics professor was lecturing to his English 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 voice from the back of the room piped up, "Yeah, right."

A certain lawyer was
A certain lawyer was quite wealthy and had a summer house in the country, to which he retreated for several weeks every year. Each summer, the lawyer would invite a different friend of his (no, that's not the punch line) to spend a week or two at this home, which happened to be in a backwoods.

On one particular occasion, he invited a Czechoslovakian friend to stay with him. The friend, eager to get a freebie off a lawyer, agreed. They had a splendid time in the country - rising early and living in the great outdoors.

Early one morning, the lawyer and his Czechoslovakian companion went out to pick berries for their morning breakfast. As they went around the berry patch, gathering blueberries and raspberries in tremendous quantities, along came two huge Bears - a male and a female. The lawyer, seeing the two bears and sensing danger, immediately dashed for cover. His friend, however, being ignorant of nature, was not so lucky. The male bear charged the paralyzed Czechoslovakian, then swallowed him whole.

The lawyer, instilled with fright, rushed back to his car and sped into town to get the local sheriff. The sheriff, upon hearing the lawyer's unsettling story, grabbed his rifle and dashed back to the berry patch with the lawyer following closely behind.

Sure enough, the two bears were still there. ''He's in THAT one!'', cried the lawyer, pointing to the male, all the while visions of lawsuits from his friend's family lagged in the back of his mind. He just had to save his friend. The sheriff looked at the two bears, and without batting an eye, leveled his rifle, took careful aim, and SHOT THE FEMALE.

''What did you do that for!'', exclaimed the lawyer, ''I said he was in the other one!''

''Exactly,'' replied the sheriff, ''Would YOU believe a lawyer who told you the Czech was in the male?''