Is the glass half-full or is it
half-empty? We have grown up with this question. It is said that an
optimist sees the glass half-full, whereas a pessimist sees it
otherwise.
However, look at the other way. Instead
of just seeing the glass, what would happen if you have to explain about
this point on optimism/pessimism to someone? Psychologists have done
various experiments on questions similar to this and concluded that the
way you present a message can change its interpretation.