ES Knowledge Base - Sailing Ships

Knowledge Base Rules - This expert system uses Tested Certainty Factors calculated from user test data. [# Tests = 670]
#	Rule	Notes	Image
1	IF the number of masts on the vessel is 3 or more AND there are square sails on all masts THEN the vessel is probably (Cf=0.61) a Full-rigged sailing ship.	This ship has 3 or more masts with square sails on all masts
2	IF the number of masts on the vessel is 3 or more AND there are square sails on first 2 masts THEN the vessel is probably (Cf=0.63) a Barque.	This sailing ship has 3 or more masts with square sails on just the first 2 masts.
3	IF the number of masts on the vessel is 3 or more AND there are square sails on first mast only THEN the vessel is probably (Cf=0.65) a Barquentine.	This sailing ship has 3 or more masts with square sails on the first mast only.
4	IF the number of masts on the vessel is 3 or more AND there are square sails on no masts THEN the vessel is probably (Cf=0.62) a Staysail Schooner.	This sailing ship has 3 or more masts with no square sails present.
5	IF the number of masts on the vessel is 1 only AND the number of foresails the vessel has is 1 only THEN the vessel is probably (Cf=0.38) a Sloop.	This sailing boat has only one mast. It has only 1 foresail.
6	IF the number of masts on the vessel is 1 only AND the number of foresails the vessel has is 2 or more THEN the vessel is probably (Cf=0.38) a Cutter.	This sailing boat has only one mast. It has 2 or more foresails.
7	IF the number of masts on the vessel is 2 only AND there are square sails on first 2 masts THEN the vessel is probably (Cf=0.61) a Brig.	This sailing ship has only 2 masts with square sails on both.
8	IF the number of masts on the vessel is 2 only AND there are square sails on first mast only THEN the vessel is probably (Cf=0.65) a Brigantine.	This ship has just 2 masts with square sails present only on the first mast.
9	IF the number of masts on the vessel is 2 only AND there are square sails on no masts AND the taller of the 2 masts is the the aft mast THEN the vessel is probably (Cf=0.48) a Schooner.	This vessel has 2 masts with no square sails. The aft mast is taller than the fore mast.
10	IF the number of masts on the vessel is 2 only AND there are square sails on no masts AND the taller of the 2 masts is the the fore mast AND the aft mast is fore of the rudder THEN the vessel is probably (Cf=0.33) a Ketch.	This vessel has 2 masts with no square sails. The aft mast is shorter than the foremast with the steering position behind the aft mast.
11	IF the number of masts on the vessel is 2 only AND there are square sails on no masts AND the taller of the 2 masts is the the fore mast AND the aft mast is aft of the rudder THEN the vessel is probably (Cf=0.33) a Yawl.	This vessel has 2 masts with no square sails. The aft mast is shorter than the foremast with the steering position in front of the aft mast.

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Expert System - Sailing Ships by McGoo Software