The pulp becomes necrotic because of tooth trauma or tooth decay, and the tooth will appear greyish-black. Endodontic treatment must be done to treat the discoloured tooth which has pulp necrosis. If teeth still appear greyish-black, dentist can treat the discolored teeth by bleaching , laminate veneer or crown .
Reasoning, as a way of proving arguments, comes in many different forms. Different forms of reasoning are accepted in different fields and contexts. Arguing with family members generally relies on different methods of reasoning than arguing with professors.
Motivated reasoning. Motivated reasoning is an emotion-biased decision-making phenomenon studied in cognitive science and social psychology. This term describes the role of motivation in cognitive processes such as decision-making and attitude change in a number of paradigms, including: Cognitive dissonance reduction.