Evidence-based computer knowledge acquisition, expression verification, and problem solving methods and systems are disclosed. Embodiments are described that include methods for automatically evaluating natural language expressions by processing an argument of an analysis of a natural language expression. Also included is the processing of one or more items of evidence associated with the argument, and determining a quality score for the argument and the one or more items of evidence. The arguments may be based on one or more criterion associated with the natural language expression.
Comparative expression processing