She just doesn't want to admit that she is wrong. She says we are human and imperfect, but acts like she is perfect and never ex

Basically my grandpa almost went to Nam (she mentioned it after some freshmen is being treated like King at my school, I'm the 6th in line), but it was the same day as our final day in the war, and I said only 75k out of 1m men (all, 500k at the highest there) and said that was soooo brutal for a nation and our nation and how no nation has EVER lost 1m in a single war (see?). I bring up WW1 (was going to do Nap wars next, buuut no) and she said we were in for 4 years and 15m people died (when it was DOUBLE that). I say 30m and how we lost 100k, and in WW2, we lost 400k. I was going to say that the USSR had a smaller pop and lost 25m, but then she asked for where I got my Nam number for deaths. I said history books, and she said "that's a lie, they change them"... WHY WOULD THEY CHANGE A DEATH TOLL; YEAH, MY MOM IS A COMPLETE IDIOT FOR HISTORY BUT WON'T ADMIT IT SO SHE IS BEING A CONSPIRACY THEORIST