“The sun” gets the article “the,” because there is only one sun. Anything that we have only one of, we put the article. How about “reality”? When we use the word “reality,” don’t we imply its absoluteness? If there are many realities, then the word loses its meaning, i.e., it is no longer reality but an interpretation. If I mean by “reality” something there is only one of, couldn’t I put the article? For example:
“Joe is out of touch with the reality.”
(with that, I mean one and the only reality; not a specific one.).