Answer:
As the boy steamboat pilot on the Mississippi River, Mark Twain was taught a useful, but challenging, showing by the skilled pilot, Mr. Bixby. Mr. Bixby asked Mark if he knew enough to get this boat across the closed path. Knowing that there cost a lot of food at this line and no possibility of going aground, sign responded that indeed he would, since “I wouldn't go lower there with a church steeple.†Mr. Bixby replied, “You think So, do you? € Something in Mr. Bixby's voice shook Mark's confidence, which Mr. Bixby's leaving Mark alone in the pilothouse did nothing to restore. This path did not go smoothly.
Hierarchical scale is the answer
