The invention simplifies the structure of a rotor and the output shaft, improves the forcing condition of the rotor and the output shaft, and causes an engine to run more stable.

The knockout condition rule discussed at the start of this article is in fact a business rule, because it is forcing a business constraint — to decline the policy to a high-risk driver.

Also, the effects of forcing a patient to quit smoking on that patient's psychiatric condition are unknown, he said.