I mean, you cannot trust in only one source. And I've written what I've written to provoke anyone's thought about all of the trust thing. 

Anyone could tell that Wikipedia is fake until there are enough trusted sources for all articles, and all of the people in the world could make consensus on which source tells the truth. So forever, because that will never be true. 
But Wikipedia is more reliable than (think here a big number under 100 because I don't want it seeming like a fact) percent of all of the junk webpages, click-bait shits, Facebook craps where people think they finally found the truth about everything, because they sounds extraordinary and logical. 

However, I also admit Wikipedia's weaknesses. The biggest one – and it's hard to say – that it gives everyone freedom (oh, not hard, it is terrible to say!) :( Since it gives any language independence about rules, communities, etc., the first problem, that is going hand-in-hand with languages, is nationalism. Just see how different nations teach history in the school... That is why there is only a little difference e.g. in the tech related articles, but could be huge in political ones.