"Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruit salad." Miles Kington
Philosophy is wondering if that means ketchup is a smoothie.
Optimist = Glass is half full. Pessimist = Glass is half empty. Engineer = Glass is twice as big as it should be.
Stoic = Delighted to have a glass.
Realist = Sees half a glass of water and drinks it. The pessimist cheers because now it's empty.
A pessimist sees a dark tunnel. An optimist sees the light at the end of the tunnel! The realist sees the approaching train.
Look out, Mikek