 Now, what's a foreseeable harm, right? What is a reasonable precaution? That's why you go to law school and that's why you study Oliver Wendell Holmes. You know, one of the great contributions of Oliver Wendell Holmes is to note that over the centuries, the common law judges have developed a so-called objective test in determining, for example, what is a foreseeable harm or what is a reasonable precaution to avoid a foreseeable harm.