It is impossible to prove that it is the case that everything is fake and it is impossible that it isn’t. Lots of things like this we cannot know for sure. However, you parents being real, society being real etc is a less complex explanation than everything being a VR simulation. If you do not have additional information, then the less complex explanation often is the most likely. So, if you assume reality is not a simulation, you are more likely to be right.
He is Dutch. I think he did not fully understand the connotations that the word “daddy” has in English. If you made the same joke in Dutch it is still weird, but it feels/sounds less degrading to oneself. It would be more like saying that someone is the wisest or the adult in the situation.
My sister has passed away a couple of years ago. She still has an in memoriam account on Facebook. I am afraid to request to remove it as I am not sure whether someone is still looking at it sometimes for comfort. I do want to keep an eye on it in case someone posts something on her wall, so I still have an account myself to check it. That is the only reason. I never do anything else with it and I ditched Instagram.
It is how trauma works sometimes if it is not dealt with.