Both the reading and lecture discussed the wide roads which Chaco people constructed. The reading passage argues there are three possible explanations that why Chaco people built and maintained wide roads. However, the lecturer refutes these explanations are doubtful by following reasons.
To begin with, the lecturer’s first arguing point is the purpose of transportation through the these roads. The speaker acclaims that it is unlikely that these roads were not for the transportation of merchandise and people. This is because they do not connect any settlements. Also, there were only livestock used for merchandise. The people who lived at that time only walked, not taking any transportation. So the lecturer refutes that the reading’s assertion that these roads were used for transportation of merchandise and people.
On top of that, the lecturer’s second arguing point is the religious purpose. The speaker insists that the roads have little connection to religious purpose each other. So the lecturer refutes the reading’s proposition that these roads may have been primarily religious in function.
Finally, the lecturer’s last arguing point is the purpose of escape. The speaker acclaims that these roads were not used for escape route for their troops and civilians when enemies attacked. This is because there was no defensive tool and no traces that the people tried to escape. So the lecturer refutes the reading’s assertions that the Chaco people used these roads as an escape route to protect themselves when enemies attacked.
In sum, while the reading passage insists that there are three possible explanation for cause why the Chaco people built the wide roads, the lecturer refutes the points made in the reading by claiming the above three reasons.