Example of Complexity for Compounds Having Critical Temperature (Tc) Data
§ CN     AC
§ Tc before 1996* 500      14
§ Tc after    1995** 100      21
§
§ CN - Compound Number; AC - Average Complexity
§
§ * 500 compounds having critical temperature reported before 1996.
§ ** 100 new compounds reported between 1996 and 2001.
The first line means there are about 500 compounds which have critical temperatures reported before 1996.

The second line means there are around 100 compounds which have critical temperatures reported between 1996 and 2001.

What does this information mean? It just likes that a student in 7_th grade is asked to answer questions for students in 8_th or 9_th grade. So, you can imagine that most students could have troubles in answering the questions. Because the question are beyond their abilities.The example I given before shows this kind of problem in models.