Non Liquet
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Lat It is not clear. In the Roman courts, when any of the judges, after the hearing of a cause, were not satisfied that the case was made clear enough for them to pronounce a verdict, they were privileged to signify this opinion by casting a ballot inscribed with the letters "N. L," the abbreviated form of the phrase "non liquet."