Referencing
You can't trust anything you read on the web as fact unless you fully understand the objectives of the source it comes from. Below is how Wikipedia structures which sources to trust.
However, the word reliable simply implies they are not making things up, it does not take into account potential biases of each source framing the issue as such to reduce cognitive dissonance of its viewers and therefore making it more digestible.
News is not a term in science. News in our society represents a source of authoratitative informations which does not disclose its own biases.
In Borges' The Library of Babel, there is a thought experiment where all possible 410-page books of a certain format and character set are available to anyone. Essentially, within our own confines this represents all knowledge humans could possibly produce. This is analogous to the internet.