Expert System - Sailing Ships by McGoo Software

Based on the responses you have made:

The vessel is probably a Brig

Conclusion Notes:

This sailing ship has only 2 masts with square sails on both.

Expert System Rule:

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 a Brig.

Calculated Certainty Factor: 0.61 = probably