Opening gambit"How is this different from that ? In what ways is that the same as this ? What can we learn from looking at the two together ? Now, analyse the two methodically ... "Contrast is one of the most fundamental and powerful ways of thinking. Surely, one of the very earliest thoughts that every single one of us has had was "...womb warm ... here cold ... WAAAH!" We grasp things not just by what they are, but...