How to deal with an incompetent intern?

I'm a third year surgical resident.

My intern does the following:

He confabulates when he isn't sure. Doesn't say I don't know and ends up giving false or altered facts.

He's distracted most of the time. Doesn't pay attention to what other people are saying.

He doesn't confirm what is told to him and ends up doing something else then he gets defensive when he's questioned about it.

He's unreliable and I can't trust him as a source of information from patients, attendings and other ancillary staff members due to the above.

He's very slow and inefficient time manager.

He discontinues orders on his own without reviewing with senior doctors and with no evidence to support what he did or clear thought process.

He doesn't seem to know how to apply his medical knowledge or translate it into a plan.

He's very passive about patients' care.

He focuses on small stuff and forgets the main problem.

I tried to give him feedback and tips on how to improve but I think I reached a wall.