Here is the definition of arbitrary:

"The term arbitrary describes a course of action or a decision that is not based on reason or judgment but on personal will or discretion without regard to rules or standards."

Most of Pai's arguments are half-truths or out right lies. There have been several instances where his claims were fact checked against the data and proved to be false.

Furthermore: "In many instances, the term implies an element of bad faith, and it may be used synonymously with tyrannical or despotic."

I think there's a good case that Pai's actions and statements could be shown to be despotic.