1.   It was not wickedness that led him into crime but a cheerfully impulsive nature and an almost complete lack of reasoning power.

2.   Fox, who maintains one of the largest databases on child crime, said young children lack the reasoning powers to fully comprehend their acts.

3.   In a flash, my alert mind and superior reasoning powers enabled me to pinpoint the disturbance.

4.   But it generally was believed that the neocortex, with its storehouse of memories and advanced reasoning power, was unique, stable and unchanging.