Let's say one has a colleague who is a royal PITA when she doesn't get enough rest. However, when that colleague gets enough rest, she is still a pain, just not a royal one. When rested, the colleague is somewhat more level-headed, but still given to whining and making excuses as a backhanded apology for previous behavior. At what point does one stop blaming the lack of rest and simply realize the colleague is a jerk at heart?
Do you and I work at the same place and have the same colleague?