How to find whether a news is fake or not

Actually to find the authenticity of a news. A debate should happen between, someone who posted the news and the organisation, which is in stake. We want people to vote whether the news is authentic or fake. How we are going to make that votes authentic?
We are going to allow authentic people to vote. How is that? Suppose there is a news about a chew gum brand X. If anybody who sees the debate is allowed to vote, there's a chance that, it is a fake account or he doesn't know anything about chewing gums. To make it authentic, we are gonna allow only people who has dealt in that area and experience in that field, for atleast 6 months. Everyone can choose areas of interest for maximum 3 fields, and atleast his/ her 5 friends should have acknowledged him in that field for a period of 6 months. No dormant accounts or new accounts. It's not that only experts should vote. But only their numbers will be shown. Popular vote, anybody can vote, no number of votes will be shown. Just a thin line, two colours to represent both sides. So, whoever gets maximum fake votes, everyday, we can put funny videos on them. If u r in WhatsApp, i think Facebook can connect to know areas of interest and can vote on them.