By Dave Robison The crowd cheers, “Half-full, half-full!”  Buzzer rings…nope, the answer is neither. Why are so many people saying the glass is half-full? There are people saying half-empty as well.  Those Debbie Downers (the half-empty glass people) might say something like this: “Ohhhh, the market, it’s awful. It’s killed our business.”  Those saying their glass is half-full might say something like …