When a ranter with a bullhorn says there are two kinds of people, I hide the silver and move away. But it is interesting to sort people you know about into groups and choose among them.
When I married, it suddenly hit me: There are two kinds of people, those married and the rest. The singles have so much time for themselves. (Picture shows me with two sacks of flour learning to sympathize with my pregnant wife). Scarcely a year later, another insight hit me: There are two kinds of people, those with children and the rest. The “withouts” have so much time for themselves.
If there are thirty people in the room, there are thirty kinds of people, but when someone dangles “there are two kinds of people”, I always turn with curiosity. Will it be left (moonbat) and right (wingnut), authoritarian and libertarian, or combinations of the above? Introvert-extrovert or left-brain/right-brain? The twelve birth signs of the zodiac based on the month or the twelve birth signs of the Chinese calendar based on the year? Or even better, an annotated printout of my 25,000 genes? Google image results for Personality Types.
How little do you need to make a useful choice?
Can you get the idea of a ball across with a single Lego block?