Although many personal injury cases inherently conjure emotion in those responsible for deciding their outcome, courts must work hard to ensure emotion is not a substantial factor in the final judgment.
For example, strong dislike of a plaintiff shouldn’t affect whether a jury finds that person entitled to damages, just as dislike of a defendant should not render them liable. But humans are emotional creatures. Sometimes defendants are unlikable and sometimes plaintiff’s situation is so awful, one can’t help but feel for them.
But if a jury does make a decision that is infused with sympathy and based on emotion rather than fact, it must be set aside.