Combination of discernment, intuition, deductive reasoning, and life experiences. I've both been burned for a relatively short time by one opportunistic and manipulative person, and have had a wonderful working relationship with a truly gifted channeler. When I said to the writer of the article that he was wasting his time and energy trying to convince you, I meant no disrespect. I just know there's no point in arguing about such things with anyone who demands proof. Sometimes people can know things that cannot be proven to another but that doesn't reduce it to mere belief. https://medium.com/illumination-curated/lets-talk-about-knowing-versus-believing-21175cf0caee