And if they exercise their personal, reasoned judgement and ignore the rule, they’re doing their job wrong.

如果他们行使个人的、理性的判断而无视规则，那么他们的工作就是错误的。

Perhaps for now, deciding what the 'right' amount of screen time is has to be down to personal judgement.

也许就目前而言，决定“正确”的屏幕时间量必须取决于个人判断。

There are about 750,000 police officers in the United States, and it’s their personal judgement that makes for the actual application of the law.

美国大约有 750,000 名警察，他们的个人判断决定了法律的实际适用。