Is it fair to withhold test and assignment memorandums at tertiary educational institutes? I have a module at university that broadly covers data structures and algorithms. The subject coordinator of said module simply refuses to supply any feedback or opportunities to students that want to learn from their mistakes.

He states that doing so does not promote students to think for themselves, or simply that no such documents (i.e. memorandums) exists (which I know to be false).

Is this rationale generally accepted amongst lecturers?
Is it fair to deprive students the opportunity to learn from their mistakes?
There may be many reasons why no feedback is given; complexity of the undertaking, legal issues, organisation etc. However, not promoting students thinking for themselves, as reason, simply does not make sense. Of course, students need feedback. Assuming, however, you got feedback during the course, the feedback from the assessment is not really central anymore.