my husband is in very early stage of Dementia, I can't hold a convasation with him like i use too. his understanding is very bad, and when I try to correct him, he just goes into a rage. do you think it would be better too just agree with him even if he is wrong?
Or perhaps not agree with him exactly, but don't get into confrontations with him and don't argue about who is "right." He is losing his ability to reason logically, so you are not going to win any arguments that way.
If breakfast was a half an hour ago and he says, "I haven't eaten for hours!" you don't have to correct him. Instead say, "Should I make you some toast?" or "Would a glass of tomato juice and some crackers tide you over until I get lunch ready?" of "Why don't you take an apple out of the fridge?"
He is not doing this to aggravate you (though he is succeeding at that, isn't he?) He is doing this because his brain isn't working correctly. Once you accept that, it is a little easier to deal with his errors and stubborness. (At least it was for me, dealing with my husband.)
It would be helpful, I think, to start reading up on what you can expect of a person with dementia, and helpful tips on how to deal with some of the common behaviors. You are in very early stage now, and the road to the end is bumpy. It is a stressful journey. You can't change that, but knowledge of what to expect can at least reduce some of the shocks.
Not being able to hold a conversation with a partner you've conversed with for years is a truly distressing loss. There will be other losses along the way. Allow yourself to mourn them. The man you married is still in there, and you will see glimpses of him even in the last stages. Cherish those. And try not to take his changes toward you personally. They are definitely beyond his control.
For what it is worth, I hope this helps.