There's a difference between "evidence" and wisdom(truth). However, with the Internet in it's present form, there are plenty of places to link to that won't provide anything but conjecture, opinion or belief, instead of researching out facts if there are facts with regards to the subject matter.
There are some subject matter which is based on logic and rationale, which reveal wisdom(truth), which don't require any links to anywhere to support such writing.
A prime example. If you take a look at many of the hubs I have written, then you will notice not many of them have links leading elsewhere because each one doesn't require them.
When logic and rationale answer the subject matter and reveal wisdom(truth), then it has done it's job. Whether or not someone accepts what is said is based solely on that person's ability to see beyond their own ego. It rests on it. Because, TRUTH is beyond the ego.