But the point to think about for next time is just, is it really true that all three of the premises are true, or might one or more of them be false?

但下次要思考的关键是,那三个前提是否的确全部为真,或许一个或几个为假呢

耶鲁公开课 - 死亡课程节选

Now, less than is just, if you haven't used it before, it's just the operator you'd expect, it's comparing two things and it's going to return either true or false depending on whether the first argument is false less than the second argument.

现在，小于这个符号是，如果你之前没用过它的话，它就是你期望的那个运算符，它会比较两个独享,然后基于第一个参数是不是,小于第二个参数,返回true或者。

麻省理工公开课 - 计算机科学及编程导论课程节选