7 tips to strengthen the mind through identifying and overcoming implicit bias James Gray Robinson. Science explains that our minds are like icebergs: Our conscious awareness represents 10% of the iceberg above the surface of the water, and our unconscious awareness represents 90% of the iceberg unseen below the surface of the water. We are not aware of 90% of our thoughts/brain functions, which are unconscious—by definition. Implicit bias, which is a relatively recent concept in the psychiatric field, attempts to describe the unconscious prejudices and stereotypes we form without conscious awareness. It is human nature to have biases, whether we want to admit to them or not.