Is the glass half empty or half full? Is the glass half empty or half full? "Is the glass half empty or half full?" is a common expression, a proverbial phrase, generally used rhetorically to indicate that a particular situation could be a cause for optimism (half full) or pessimism (half empty), or as a general litmus test to simply determine an individual's worldview. The purpose of the question is to demonstrate that the situation may be seen in different ways depending on one's point of view and that there may be opportunity in the situation as well as trouble. Another perspective comes from psychology, where research has
Lick Run (West Branch Susquehanna River tributary) upstream of Flegals Run, the manganese load of Lick Run is per day. The daily loads of acidity and alkalinity at this location are and , respectively. Between Flegals Run and the mouth of Lick Run, the concentration of manganese is 0.7 milligrams per liter, the concentration of acidity is 22.37 milligrams per liter, and the concentration of alkalinity is 7.33 milligrams per liter. Between UNT 26087 and UNT 26085, the manganese load of Lick Run is per day. The daily alkalinity load is and the acidity load is per day. The concentrations of manganese, alkalinity, and acidity are 2.53