Oh blimey. I mean, its maths and logic isn't it, where do feelings come into it? The gravitational constant doesn't care how anybody feels about it, does it? :shrug:half full, half empty, its all just half of what could be a whole. Lets make it bigger!
* but I get your point ;)
I don't understand the question? A half-full glass is identical to a half-empty one. My glass is probably three-quarters full at least (or a quarter-empty, if you prefer)