Comment by stordoff

> Also good tests are hard to write. I’ve seen T/F questions that could go either way. Multiple choice questions with more than one correct answer. (Professors will tell you to choose the “best” answer. But that’s a matter of opinion in many, if not all, cases.)

This is why I am so glad that all of my university exams (and the _vast_ majority of exams before that, at least post-Y9/age 13) were open-ended questions[1], then marked by someone who will (likely) know the subject better than you even will. Even if you couldn't get the the answer, but could understand and articulate the starting points, or made a compelling argument but misread or misunderstood part of the question, you will at least get partial credit. The physics exams would also have a standardised formulae reference sheet.

[1] A typical paper would be three hours, answering 5-6 questions, and a typical subquestion can be as open-ended as "Write brief notes about a tree representation of functional arrays, subscripted by positive integers according to their representation in binary notation. How efficient are the lookup and update operations?"