Some of us are lucky enough to have students who ask sharp questions that bring us up short and force us back to basic and difficult issues.

Only the Cameroons, paralysed as they are by the fashionable prejudices aired at metropolitan dinner tables and the terror of getting on the wrong side of the BBC sneerocracy.

The plench produces sufficient torque to move a nut, but doesn't pass on torque to the astronaut. External torque to move socket wrench is produced by squeezing the handles.

I find thou art no less than fame hath bruited.