这个说法曾经受到规定语法学派的反对，他们认为，because不能像wh-word那样，引导主语从句，要替换为the fact that。
*Because he's old doesn't mean he's stupid.
The fact that he's old doesn't mean he's stupid.
但是，这个用法后来得到认可，认为属于非正式用法。国内有些辞书认为：非正式用法或非正式美国用法。比较权威的PEU认为：在非正式口语中非常常用。书中实例如下：
1. Just because you're older than me (it) doesn't mean you can do what you like.
2. Just because I'm your brother (it) doesn't mean you can keep asking me for money.
仅供参考。
