I usually doubt everything till it is proved by me or by others. By that way, I learn well, and enhance. Several years ago, I read an article written by an outstanding scientist. I found an irrational issue. I proved my point of view, then I contacted the author to share with him my finding. He was very happy as I discovered that point. By the way, it was a typo, and that typo was used as a fact in some papers authored by other researchers.