A small child is walking beside his mother along a busy street where crowds of people are coming and going and cars are speeding past, horns blaring and brakes screeching.
When a child is asked to do something that appears difficult, he sometimes replies, with a skepticism of tone that indicates disbelief in his ability to fulfill the request, "Who?
Considerable publicity has been given to the problem of society's dropouts, to hippies for their disregard of conventional mores and for their use of drugs.
During his college experience a student may be introduced to many concepts through the use of ''ideal models," such as ideal gases, ideal political systems, or ideal verbal communication, to name a few.
