dispassionate
Calm and fair, not ruled by strong feelings or bias.
Dispassionate means fair, calm, and not influenced by strong emotions or personal preferences. A dispassionate judge listens carefully to both sides of an argument before deciding. A dispassionate scientist analyzes data objectively, following the evidence wherever it leads, even if the results surprise or disappoint.
But being dispassionate doesn't mean being cold or uncaring. A doctor can care deeply about helping patients while still making dispassionate medical decisions based on facts and training rather than panic or wishful thinking. A referee needs to make dispassionate calls during an intense championship game, treating both teams fairly even when the crowd is roaring.
Think of dispassionate as the opposite of getting swept up in the excitement or drama of a situation. When two friends are arguing and you're trying to help them work it out, you're being dispassionate if you listen to both sides fairly instead of immediately taking your best friend's side. Your dispassion helps you see the situation more clearly than someone caught up in the argument can.