Your article reminds of a story a friend told me where some primary school teachers were made to sing the Ghanaian national anthem,which they failed to do. These same teachers were merciless when their students failed the same task. in so many ways these stories and comparisons highlight the fundamental flaws in our knowledge transfer. I sense a lot of emphasis has been placed on the superhuman tutor/professor who “knows it all”, cannot not know and is not to be challenged.