1. The propensity to display profound skepticism for the evidence of your opponents and, at the same time, complete credulity for the arguments of your intellectual friends. See, for example, this discussion of William Easterly’s Moyopia.
2. Not letting facts get in the way of a good polemic. Evidenced here with Dambasa Moyo’s claim that: “Between 1970 and 1998, when aid flows to Africa were at their peak, poverty in Africa rose from 11% to a staggering 66%”.