yes, you ought not to sell me the gun."

是的你不能向我销售枪支了
I have a friend, Park Dietz,

我有一个朋友帕克·迪茨
who is a forensic psychiatrist to the stars in Los Angeles,

他以法医精神病学家身份而闻名洛杉矶
who before he did that was a Professor at University of Virginia

在这之前他是弗吉尼亚大学的教授
and he went to the Virginia Hospital

他去了弗吉尼亚医院
for the criminally insane or some name like that,

看望那些精神病罪犯或差不多的叫法
where everyone by definition

在那每个人按定义都是
had been adjudicated mentally incompetent.

被宣告为精神残障的人
He passed out a questionnaire saying to each person,

他给每个人发了一个问卷
have you been adjudicated mentally incompetent?

问他们是否被宣告为精神残障了
75% of the people said no;

百分之七十五的人都说不是
I mean they're mentally incompetent,

他们本身就精神残障