As a guy who does a fair bit of reading and teaching, I can only sympathize for the writer of the paper Rob is criticizing. When you come up with examples you

As a guy who does a fair bit of reading and teaching, I can only sympathize for the writer of the paper Rob is criticizing. When you come up with examples you have to deal with two conflicting forces. One one hand, they have to be simple enough not be skipped over. On the other hand, they have to be complex enough to seem real. The balance is never right. It doesn't seem fair to criticize on that account. It's too easy.