A liquidated damages clause sets an amount in a contract in the event of a breach. A liquidated damages clause isn't a penalty, though it may sound like one. A penalty is usually disproportionate to the actual harm, and is meant to punish or deter breaching a contract.
Acidic stools can be caused from absorption problems from the diet and foods you eat. Some people have acidic stools as a result of a lactose intolerance.
An amoeba produces a disease of the intestines that begins with watery stools but, if untreated, will cause bloody stools to develop as digestion of the tissue by the organism reaches the underlying blood vessels. C. amoebiasis.