We all are. Our entire human world comprises overlapping subjective realities built by group consensus. What is true and rational to me is anathema to another,

We all are. Our entire human world comprises overlapping subjective realities built by group consensus. What is true and rational to me is anathema to another, and the inverse applies. From cradle to grave our realities are sculpted by our experiences and those surrounding us. Recognising this is the first step to understanding an awful lot of why people think and do what they do.