of those sentences. 

The idea is that if two pieces of evidence logically lead to a conclusion, the point representing that conclusion should be close to the sum of the points representing the evidence. They call this property "deductive additivity".

The researchers tested this idea using several different methods of representing sentences as points. They found that while some methods do show this property of deductive additivity, none of them were perfect. 

The bottom line is that this research represen