Not so, Rob, I face it many times a year. Unlike other habits, it doesn`t get easier with practice.
If the results are academic and have no personal importance, then it's possible. But when the results are going to have personal ramifications (on one's career, for example), then bias is inevitable.
This big-to-do in education about "critical thinking" is mere piety. The term "critical thinking" is meaningless. It just means "thinking."
It's a reaction to "rote" learning, although memorization has its place in education. To be sure, mere memorization by itself is not good education.