Can you coach someone who is uncoachable?

Kimberly, Sonia, and Jonathan answer a question from Lorraine in Santa Cruz, CA:
“How do you determine if someone is coachable or not? A colleague shared that someone in their department does not get along well with others, yet they are a SME (subject matter expert) that is important to the business. Seems a few leaders have tried to coach them, and nothing has changed.