when i was a kid i used to respond to the "glass half full/half empty" question by asking how the liquid in the glass got there in the first place. nobody ever gave me a chance to explain my reasoning so i'm doing it now
if you have a glass and it has some liquid in it, up to the halfway line, whether it is empty or full depends on what happened before the question was asked. if you started with a full glass and poured half out until only half remained, the glass is half empty, because if you continued pouring it would be fully empty. however, if you started with an empty glass and poured liquid from another container into the glass up to the halfway line, the glass is half full because if you continued pouring it would be all the way full. logical, no?
i was 13 years old when somebody finally told me it was supposed to be some kind of optimism/pessimism thing. i always thought it was a riddle that nobody let me solve
