Say you are building an Al system to help make diagnoses from X$-$ray scans. Which of the following statements about explainability of Al do you agree with?

Most Al systems are highly explainable, making it easy for a doctor to understand and give a particular diagnosis.

Al systems are intrinsically "black box" and cannot give any explanation for their outputs.

Explainability is usually achieved through building a chatbot to talk to the user to explain its outputs.

Lack of explainability can hamper users' willingness to trust and adopt an Al system.