Given that we can’t do much about clueless students other than laugh, here are a few incredible anecdotes: http://philosophersanon.blogspot.com/2008/04/annual-bitch-about-grade-negotiation.html
I once had a student complain after having missed an exam that he didn’t *know* that the exam would be on the day he missed. I said, “the exam days are indicated on the syllabus.” He replied: “you never told us that we had to read the syllabus.”
Suppose the teacher had wasted his time and told the students that they had to read the syllabus. Could the student then get off the hook by saying that the teacher had never said that they needed to follow his instructions?