Credible sources of information have become an urgent matter in this era. With the increasing level of accessibility to sources, which we could have only dreamed of before the invention of the internet and the emergence of social networks, we face an utterly distinct task. At any given moment, we may encounter a piece of data that is not factual or labeled as such. This relates to all kinds of sources and "levels," starting from social media and ending with scientific works published by highly reputable entities.