Broken Clocks and a Hot Air Balloon

I had a הערה about the famous question about whether a stopped clock is better than a wrong clock.

Obviously a wrong clock is better because you can figure out the time from it. A broken clock is useless because you don't know when it's right. This is the same as the mathematician's answer to the people in the balloon ("Where are we?" "In the sky.") because it is 100% correct and still has no information.

Maybe your next book can be called
כדור פורח ושעון שבור
You don't need to thank me in the introduction.