Absolutely. BP has severely affected my attention span, so I find VERY difficult to read and to me, reading is a huge part of learning. When I'm depressed, it's so very difficult for me to get out of bed and do anything, let alone focus on reading news, watching informational videos, doing puzzles, anything.
So I guess BP hasn't made me lose intelligence, but it's taken away my ability to learn, which makes me feel very unintelligent