Is it half full, half empty, neither, both, does it really matter? What kind of liquid is in the glass? Is it even a liquid at all? What if it's a solenoid or gas? What if I put eggs in it then boiled it till cooked? Would you drink it?
I prefer when looking at a glass considered divided, between it's state of empty and full evenly, to look at its most recent state. Was it being filled or was it being emptied? Consumed / drank or poured into? I believe that to be the most accurate method without finding precise values which would determine true state.
I know you're like wtf visual aids in a philosophy blog how dare you!
At least it's relevant.
Maybe it'll get me more views, what do you think?
Final question, what kind of person are you?