Answer:
False
Explanation:
I don't really study ethics but I'm pretty sure that people use reason when confronting ethics.
For example, psychologists have to consult a board before conducting an experiment to see weather its ethical or not, and they have to use reason to say weather that has a long term affect on a participant or weather it is worth the knowledge to cause someone a bit of suffering. These are all uses of reason.
I hope this is right!