You deliberately (willfully) block any reality other than the one you've concocted for yourself. A "closed system" is a loop in which no new information is allowed; brief or long, it would make no difference.
No, I just don’t waste my time with cut-n-paste posters. If they can’t take the time to do more than Control-C/Control-V/SEND, then why should I? It’s just a sneaky way of trying to get me to read your favorite moralist and I’m not going for it. You put into your own words whatever your point is, you make it succinct and you address it to me, and not include me in some SpamPing where I’m supposed to wade through your samplings and figure out what is addressed to me and what is for the other people you pinged... or don’t bother.