How to make a formula for determining the veracity of the news?

Question

Algorithms

Good day everyone.
The task is to determine the veracity of the news through voting.
There is news and three answers (BELIEVE, DON'T BELIEVE, PARTIALLY BELIEVE).
Based on these data, you need to draw up the level of truthfulness of the news (in the form of a percentage).
I've been scratching my head for a week now.
The only idea is the reader rating.
The higher the rating, the higher the weight of his vote. And the rating of readers is calculated from the likes that he received from other readers.
It turns out that readers trust this person and therefore the weight of his voice is higher.

Answer 1

Let's take Habrahabr - which has been practicing a system of tricky ratings for a long time.
Have you personally ever been drained of karma there for nothing, in general?

Answer 2

In general, depending on what news. If political, then the idea is shit, bots will buy the necessary forces quickly, like on a peekaboo, for example. If others, then the site g2g (which one xs, once went there, but you can find it by such an abbreviation) has a similar system. For example, an experienced user with a couple of years of experience has 60k points, and only a registered user has 200. That is. sit a couple of years as a bot to fill the rating - a pretty cool idea will come out in the end. They also give points for filling out the profile and so on.

Answer 3

If voting, then the easiest option is to enter a rating - believe - +1, Don't believe -1 Partially Believe 0 suppose. Also a reader rating is a good idea.
Here's another idea, add the rating of news sources, if it is not specified, we immediately give a minus, if any TASS, then +10, say.
You can also determine what kind of news a person usually likes, if he "likes" only, let's say, news that speaks well about one politician (I will not give examples so as not to stir up an argument), and "dislikes" news that speaks about another politician, then you can cut his news like power for some politician and cut the dislike power for another politician.
Well, I actually support the idea of ​​TheTalion, about filling out a profile, you can also give points for behavior, see what the user is doing, whether he communicates with other users, how he communicates, what news he watches, how many seconds he watches the news and determines how bots and cut their power.
Truthfulness is difficult to determine, especially if the news is political.
UPD: In general, you can entrust moderation to people, but moderators can also be interested. But the machine is not, unless of course you program it like that.