Everyone needs critical thinking. We all encounter opportunities in our daily lives to engage problems and decisions using strong critical thinking. Example: we use critical thinking every day as we consider the latest consumer products and why one particular product is the best among its peers.
Answer: looking back we always project our present condition on the past. That is an unconscious process. That is why many people at certain age become nostalgic increasingly looking back at "good old days". On a different level this trace of human psychology is perfectly taken advantage of in propagada (especially in the production of historical films). Very good example of that are film of Communist era about medieval era (in such films some medieval figures are frequently depicted as "Communists", whereas some kings or popes are depicted as an example "imperialist bourgeoisie" ).
Explanation: Being 100% objective is impossible. Each individual is onesided and subjective. I do not believe we can expect more from any society. Every society and every political regime is onesided and its view on certain historical events is onesided as well. If there is a freedom of expression this imperfection can be reduced.
<span>A concrete operational thinker replaces intuitive reasoning with logical reasoning. Reasoning will be based on observable quantities and qualities, not the hypothetical. As and example , a concrete thinker would know that changing the shape of a lump of clay does not change how MUCH there is of the clay, as they can observer the clay.</span>