Most business ethics courses and textbooks confine themselves to considering specific cases and principles.
Conclusion
Business ethics courses and books should stop limiting themselves to specific cases and principles and instead include abstract ethical theory as well.
Evidence
The current approach fails to provide a framework for understanding specific principles.
Evaluate
Why does the author want business ethics courses to include abstract ethical theory? Because she laments that the current approach fails to help students understand specific principles.
So we can tell she's assuming that .
If we were trying to object to this argument, we might say,
So the author could strengthen her argument by establishing that there is some compelling reason why we care whether or not students understand the ethical principles.
Goal
Look for a Linking answer joining "abstract ethical theory" to "providing framework for understanding specific principles".
Or look for an answer that makes us think this supposed causal difference-maker (whether or not students have a framework for understanding principles) is valuable.