To provide my own anecdote, refusing to take any feedback except orally was how the Sacklers instructed their sales reps to handle issues and concerns about Oxy

To provide my own anecdote, refusing to take any feedback except orally was how the Sacklers instructed their sales reps to handle issues and concerns about Oxycontin abuse. It was to avoid having any discoverable evidence that they received reports of abuse and did nothing about it.