Tom and Mary are quite stubborn, aren't they?

Tom is likely to be stubborn, isn't he?

He is stubborn.

Your stubble suits you.

Stubbornness can ruin a friendship.

I'm not as stubborn as you say I am, and you can't change my mind.

Tom is stubborn.

I wonder why Tom and Mary are being so stubborn.

You're stubborn, aren't you?

Why are you being so stubborn about this?