Critical Reasoning is an important ability for any Agent, be they a Bad Slasher, Assassin, Floater, or Pyro. Critical reasoning is, to steal from Wikipedia, the purposeful and reflective judgement about what to believe or what to do in response to observations, experience, verbal or written expressions, or arguments. Critical reasoning is also important for Boarders as well; it is the best way to keep yourself from looking ridiculous unintentionally. (That said, you should really read the entire article over there, it is quite interesting.)