Dialectic is a formal system of reasoning that arrives at the truth through the exchange of logical arguments. Dialectic is a process of examining an issue using very careful steps. A thesis, or argument, is offered, followed by the antithesis, or counterargument. The goal is to extract the best points from each of these to form a synthesis..
Other causes of unintentional weight loss include: 1  cancer. 2  hyperthyroidism (overactive thyroid gland). 3  hypothyroidism (underactive thyroid gland). 4  abdominal infection. 5  gastroenteritis. 6  malnutrition. 7  dementia. 8  Celiac disease. 9  HIV/AIDS.
In some cases, sudden loss of appetite occurs at an advanced stage illness, such as congestive heart failure or kidney failure. Psychological diseases including depression, anxiety disorder and schizophrenia can also cause sudden loss of appetite, particularly if symptoms of the underlying disease increase suddenly.