Some Criteria of the Knowledge Representation Method for an Intelligent Problem Solver in STEM Education

Table 4

Levels of naturalness criterion.

Level 1	Level 2	Level 3	Level 4
(i) The specification language is machinery; (ii) The representation method cannot solve the common exercises of a course	(i) The specification language of the method simulates the human language, but it is not suitable for students; (ii) The representation method can solve common exercises of a course	(i) The specification language of the method is suitable for students; (ii) The system can solve some general problems. The reasoning of its solution is suitable for the level of learners	(i) The specification language of the method is similar to the natural language for knowledge representation; (ii) Solutions of the system are pedagogy; (iii) Besides solving problems automatically, the knowledge base of this system tends to tutor the student on how to solve a problem in the course