I believe the answer is: Biases
The person who made such comments usually had a a really strong preference in one economic system, to the point where that person refuse to acknoweldge the weakness in their preferred view and the strength in the opposing view. This bias could easily be held by all sides.
1) Salt
2) Fabric
3) Iron
<span>that he would find a faster way to the west indies and bring them back spices</span>
The answer to this question is the science of forensic study
