Aug 04, 2018
RAY: This week's puzzler is historical in nature, and it doesn't need any additional obfuscation or declarification. It has built-in obfuscation. Here it is:
I'm thinking of two inventions from long ago. One of them has thousands of moving parts. The other has one part and it doesn't move.
They both do the same thing.
TOM: Are they still around?
RAY: Of course. Are they still in widespread use? Of course not.
What am I thinking of?
RAY: What they're measuring is the passage of time. One is the sandglass, which has thousands of grains of sand. The other is the sundial, which has no moving parts.
Both of them measure the passage of time.