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 defending attorney was cross examining a coroner...
A defending attorney was cross examining a coroner.The attorney asks, "Before you signed the death certificate had you taken the man's pulse?" The coroner says, "No." The attorney then asks, "Did you listen for a heart beat?" "No." "So when you signed the death certificate you had not taken any steps to make sure the man was dead, had you?" The corner, now tired of the brow beating says, "Well, let me put it this way. The man's brain was sitting in a jar on my desk, but for all I know he could be out there practicing law somewhere."