It would be ideal if reality and our model of reality merged into the same thing. A model of reality explains how the universe was created and how it operates. You might think that this is a definition of reality itself, but it isn’t, which can be illustrated by looking at the most popular model, known as naïve realism.
In a nutshell, naïve realism says that what you see is what you get. In other words, the reality presented by the five senses is reliable. Such a view appeals to common sense. It rests on experiences we take for granted. There is a physical world “out there” separate from our subjective experience “in here.” The physical world predates human beings by 13.8 billion years, going back to the Big Bang. If both of those things are true, then obviously what we think, feel, and desire “in here” has no effect on reality “out there.”
As unimaginably sophisticated as modern science has become, most scientists accept naïve realism, usually without question, even though each of the common-sense facts just mentioned is known to be false.