So you have just done an eloquent job of defining the difference between reality tunnels and consensus reality. That core reality, as you put it, is a small part of consensus reality. No argument there. But most of reality consists of individual’s reality tunnels that overlap to some degree to create the larger part of consensus reality that does not consist of facts. So, most of what you know may (or may not) be wrong. Gets complicated. Even the math, as described by Wittgenstein, is cloudy. We could really argue about the nature of reality for a really long time and never really agree. :) Thanks.