Is trust an issue in your day to day life?

This is always the thing happening to me. I usually dont listen to people plainly. I would think for a second, whether they are lying or not. Most of the time, I get people caught. They always wonder how I am able to do that. It is because whenever I hear words, my mind automatically thinks what are the possibilities, what other way the person would have reacted at that time. Did he do that really, or not. I would bluntly ask them back, did you really do it? Or did that happen really. When I ask this question, they wonder, whether I had found the truth, and try to change their answer in a better way. There you go, they get caught. Apart from all these fun, you must remember that you must have atleast one person in your life, whom you can trust, because if you doubt everybody, you wont have any friends.