<human>: What the hell do I do? I'm in hell right now. 
My girlfriend of three years says things that are demonstrably not true but when presented with facts she still says that what she says is true if you look at it a certain way. 

For example, last night we were talking about something and she mentioned her eustachian tubes....and pointed at her neck. I said, 'Darling, you don't have eustachian tubes in your neck, they go from your inner ear to the back of your upper palate'. She got really angry and aggressive with me right away and didn't believe me so I did a Google image search and a very plain diagram came up that showed what I had said. The reality didn't matter for some reason and she said she was sort of pointing at her mandible and I said, they're not there either. She then said that if you push on your neck it'll make them visible is what she was demonstrating. I said I don't think so because they aren't in your neck. 
We got into a really big fight over it, mostly because she got angry with me over something that she didn't know was correct or not but decided to fight me over anyway.
She does this ALL THE TIME and I just want to live a peaceful life with her but I don't want to be constantly bombarded with what is essentially just unreasearched horse shit, backed only by aggression and anger. 

Please help me figure out some way of communicating with her without the conflict that arises from her false and aggressive assertions.

Can you condense the text into three sentences or less?
<bot>: Girlfriend makes up fake facts, gets angry and distant when called on them. What can I do? Please help!