... difficult to persuade people (especially young children) that it's not enjoyable to beat up smaller people. But it is conceivable that, under certain conditions, they will persuade themselves that such behavior is unen- joyable. Let's take a closer look. Picture the scene: You are the parent of a 5- year-old boy who enjoys beating up his 3-year-old sister. You've tried to reason with him...

... difficult to persuade people (especially young children) that it's not enjoyable to beat up smaller people. But it is conceivable that, under certain conditions, they will persuade themselves that such behavior is unen- joyable. Let's take a closer look. Picture the scene: You are the parent of a 5- year-old boy who enjoys beating up his 3-year-old sister. You've tried to reason with him...

... difficult to persuade people (especially young children) that it's not enjoyable to beat up smaller people. But it is conceivable that, under certain conditions, they will persuade themselves that such behavior is unen-joyable. Let's take a closer look. Picture the scene: You are the parent of a 5-year-old boy who enjoys beating up his 3-year-old sister. You've tried to reason with him, ...