Which term best encapsulates the habit of maintaining fairness in all situations?

The term that best encapsulates the habit of maintaining fairness in all situations is "judiciousness." This term refers to the quality of having, showing, or done with good judgment or sense, which includes the ability to make fair and well-considered decisions. A judicious individual evaluates situations based on reason and fairness rather than bias or preconceived notions.

While the other options have their own merits, they do not specifically address the concept of fairness in decision-making. Accountability involves being responsible for one's actions, consistency refers to doing something the same way over time, and reliability indicates that someone can be depended upon. None of these terms explicitly focus on the aspect of fairness, which is central to the concept of judiciousness.