As XKCD memorably observed, putting toothpaste back in the tube is trivial. However, it may not yield a result anyone's actually happy with: https://xkcd.com/

As XKCD memorably observed, putting toothpaste back in the tube is trivial. However, it may not yield a result anyone's actually happy with: https://xkcd.com/2521/ https://xkcd.com/2521/