Week 8: Post #3

When I came across, "The cause makes a difference" in Chapter 15, I found it interesting and fun to read.  An example the book gave was, "Dr. E confidently claims that the wind chime causes the elephants to stay away."  Dr. E then wrote in his diary, "There's a perfect correlation here:  Wind chime up on Tuesday, no elephants."  The problem with this example is that, how accurate is it a fact that wind chimes is the single object keeping the elephants away?  Because there's a possible change that even if the wind chime was not up, elephants would have stayed away.  Hence, "the wind chime doesn't make a difference.  We need to have the cause occur (elephants appearance) for there to be an effect (wind chime to work.)  I've learn in my own example, if I do not do my online homework, I would not get a good grade.  The cause has to make a difference.