i was pissed off at her and after i said something really condescending and cold she couldn't pick up on it at all! it just shocked me. it just made me forget everything, i couldn't even be angry at her anymore. she can never pick up on sarcasm and is always last to understand jokes, she's really impractical as well.

my question: do you think she could have some sort of mild mental disorder or are a lot of people like this?