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.
Axiom - A statement about real numbers that is accepted as true without proof. Deductive Reasoning - A form of reasoning by which each conclusion follows from the previous one; an argument is built by conclusions that progress towards a final statement. Inductive Reasoning - A form of reasoning in which a conclusion is reached based on a pattern present in numerous observations.