Computer expert system is a typical representation of computer reasoning software.

Based on the main researches on CRT, introduced the meanings of the conditional reasoning,.

The influence of three different kinds of valence(persuasive condition,dissuasive condition and neutral condition) and implicit arguments on conditional reasoning in two different positions(self and author) was researched with college students as the subjets.

Event-related brain potentials were measured when 13 normal young participants finished four kinds of conditional reasoning(MP,AC,DA,MT)tasks and one kind of baseline task(BS).

For knowledge based system (KBS), we construct the distributed application orienting to inference components using multi agent technique, and proposea scheme supporting cooperative problem solving of inference components.

In order to testify model theory and reveal the cognitive mechanism of conditional inference,this article designed two experiments to testify "premise order effect" and "the facilitation effect" in college students.

The results indicated that people endorsed a conditional argument in direct proportion to the conditional probability of the conclusion given the categorical premise,and the process of resolving conditional inference is an intuitional and effective cognitive proce.

Syntactic theories and mental models theories were two different ways to understand processing mechanism of logically valid (MP) and logically invalid (AC) conditional inferences in discourse comprehension.

The representations of events relations and event reasoning are the keys for events-based knowledge processing.

Objective weights calculation model of decision-makers in multi-criteria group intelligent decision based on soft case-based reasoning;