It's half empty of poison.
Saying a glass is half full of poison isn't so much pessimistic as it is paranoid. Unless it really is half full of poison, in which case you have good reason to be both pessimistic and paranoid.
But the realist doesn't care because no one said you had to drink what was in the glass.
but if the glass is half full/ empty then said glass is twice as big as it needed to be
It's half empty of poison.
Saying a glass is half full of poison isn't so much pessimistic as it is paranoid. Unless it really is half full of poison, in which case you have good reason to be both pessimistic and paranoid.
But the realist doesn't care because no one said you had to drink what was in the glass.
but if the glass is half full/ empty then said glass is twice as big as it needed to be