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Comment by thedufer | Hacker News Reader

I prefer "There are 3 hard problems in computer science: cache invalidation and naming things."

My favorite on this vein is: "There are 10 types of people in the world: those who understand binary and those who don't."

I prefer, "There are 10 types of people in the world: those who understand hexadecimal and F the rest."

I like this variation:

  There are 10 type of people in the world:
  Those who understand binary
  Those who don't
  And those who count from zero

Or:

There are 10 types of people in the world: those who understand binary, those who don't, and those who didn't expect this joke to be in base three.