金水，杀人游戏术语，在杀人游戏或狼人游戏（狼人杀）中被预言家公布身份为民及民以上。
“金水”在杀人类游戏中的应用来源于“金水法则（Goldwater rule）”。
金水相关规定
美国心理协会（American Psychological Association）《APA 道德原则 7.3章节》规定：“在没有直接对病人进行诊断、及未获得病人本人或其法定监护人允许的情况下，职业心理医师不能对病人的情况发表专业评论。”
原文："On occasion psychiatrists are asked for an opinion about an individual who is in the light of public attention or who has disclosed information about himself/herself through public media. In such circumstances, a psychiatrist may share with the public his or her expertise about psychiatric issues in general. However, it is unethical for a psychiatrist to offer a professional opinion unless he or she has conducted an examination and has been granted proper authorization for such a statement"
金水出处
美国《Fact》杂志曾刊登过一篇关于美国参议员Barry Goldwater的文章：
"The Unconscious of a Conservative: A Special Issue on the Mind of Barry Goldwater."
“揭秘一位保守党人的潜意识：Barry Goldwater内心世界特刊”
其中有对该参议员的心理分析，此后美国心理协会即加入了此道德原则。
此原则没有官方名称，因Barry Goldwater（巴里金水）而得名。
