<human>: I don't even know how exactly to explain the things she gets confused about because they're so absurd.

*  If I say something in conversation that she doesn't quite catch, she asks me to repeat it. If I repeat it any differently than what I had said EXACTLY the first time, she gets extremely frustrated and repeatedly asks me to repeat exactly what I had said the first time. 

* If I say "I guess" in response to something she says, she gets confused and asks me what I meant by that. I usually say something along the lines of "I don't really have an opinion either way", or "you're probably right", she gets frustrated and asks me to clarify even if I really don't give a shit. 

* She basically doesn't like any sort of ambiguity in conversation, and repeatedly questions me about ANYTHING ambiguous that I say. 

* If all my statements about my opinion on something, something I've said, something we're talking about, etc. don't line up exactly with each other, she gets frustrated and keeps asking me to clarify what exactly I meant by saying a certain thing. 

I don't always remember exactly what I've said, or exactly what I mean when I say things! She does this to everyone in our family and it's really starting to take a toll. I don't even want to talk to her anymore because I know any conversation will inevitable descend into her fucking interrogating me about some stupid trivial shit that literally has no bearing on the actual point of our conversation. What is her problem?! What can we do to fix it?

Can you give me the gist of the text in a nutshell?
<bot>: sister gets extremely confused and frustrated about trivial details in conversation, it's incredibly difficult to talk to her at this point. What can we do?