My soon to be ex-wife does this. It is absolutely toxic. She never engages an argument directly. Ignores, lies, and makes dishonest arguments. If she ever, capitulates, its a trick. She has no intention of following through or taking the agreed upon approach.<p>I've devoted a lot of thought to this as its destroyed my life-- the thing about it is, my sample size of one, these people will say anything to justify whatever they want, and when you point out their behavior, they generally get nasty and find a way to turn it back on you.