Are you bluffing yourself? You could be:

  1. If you developed an opinion not based on a process for concluding but because you followed what others were doing
  2. If you find a spilt in your heart and mind about something you are doing. You know both are not aligned
  3. If you see yourself develop an ego and not able to give logical answers when somebody questions your beliefs
  4. If you find it hard to develop an inverted opinion about something you so conclusively believe
  5. If you consider some verdict as final instead of believing some piece of information can be available which can falsify your current opinions
  6. You believe something to be true just because you spent more hours learning or doing it