Never make predictions, especially about the future. But in civil commitments, courts predict future behavior all the time. Judicial action here has severe results for the individual: deprivation of liberty, potentially unwanted and intrusive treatment, and the stigma of mental illness. Judicial inaction can also do harm: erroneous release can lead to injury of the person or others. Resolving these risks requires courts to find the person poses a danger to him/herself or others because of a mental illness.
Scherr, Alexander W., "Daubert & Danger: The "Fit" of Expert Predictions in Civil Commitments" (2003). Popular Media. Paper 13.