What is meant by

1) errors or error tendencies are common to all People by virtue of being human (for example, Tendency to selectively perceive or impulsive judgment or Simplify complex facts).

2)Errors in the general fashion of an age (for example, the tendency in our grandparents day to accept authority unquestioningly or the tendency in ours to recognize no authority but oneself).

3)Errors or tendencies to error associated with ones individual habits of mind or personal attitudes, beliefs, or theories (for example, the habit of thinking the worst of members of a race or religion against which one harbors prejudice) .

4)Errors that come from human communication and the limitations of language (for example, the practice of expressing a thought or feeling inadequately and leading others to form a mistaken impression).