Comment on The cylinder must remain unharmed

• edinbruh@feddit.it ⁨1⁩ ⁨week⁩ ago

  The cavity is not a cavity, because there’s the walls of the second hole passing through it

  source

  • WraithGear@lemmy.world ⁨1⁩ ⁨week⁩ ago

    by jove! i think you are right!

    source