My favourite sailing trivia question is “what’s the difference between a ketch and a yawl”.
If you have relatives overstaying there Xmas visit you can use this article to drive them out of the house by testing them with such questions.
The article covers most sailboat types. By the way a yawl, by my definition, has the mizzenmast aft of the rudder whereas a ketch has it it in front but that sort of argument will also assist with removing visitors
Happy new year
