What is investigative journalism?

[downbeatplumb]

"Investigative journalism" used to be known as "journalism". 

"Journalism is to politician as dog is to lamp post." - Mencken

Not neccessarily. There are fashion-magazin journalists, journalists who write for the daily local news-paper, etc.
But I know what you mean. When I was asking about "investigative" journalism, I was asking about those outlets/magazins/news-channels that are into putting together the pieces of a bigger picture of the world we are living in.

I was especially asking about what the pre-conditions are in which real/actual/serious investigative journalism would be considered as such, in which it can and will investigate some "real" stuff, and by that getting its job done. Which are, according to you and your sources?

Reputable news sources are ones that have gained a reputation for correct stories and providing clear evidence in support of them.

I'm not sure what you aren't getting here.

Facts in journalism are the same as facts in anything else. They need verifiable supporting evidence and the ability to be checked and verified.

You keep asking the same questions getting the same answers then doing it again.

This seems a common thing theists do, trying to get an answer they can attack, is that your game or is English not your first language.