Generalizations make abstractions attractive. Each generalization is a simplification. It is easily absorbed as it does not require examination but only interpretation. Grasping an abstraction is relatively effortless because it does not necessitate gaining new information but merely filtering the known available data. Assimilation of an abstract concept is rather a process of unlearning than of learning. Abstract reasoning simulates comprehension without giving factual knowledge. It is an interpretation of preselected facts that shows the world from a certain angle.