Everyone inhabits their own subjective realty, as far as their world views, likes, dislikes, preferences, beliefs, personality make up, optimist vs.perceptions of the same event etc. However, there is also concrete reality, as in, if any of us hit a concrete wall at 75mph we will share the same experience of having our heads explode like a watermelon against the reality that concrete is harder than the human skull. That’s a pretty safe take on the ultimate reality of the laws of physics.lol