@hinterwaeldler hmm it's rather a challenge on how to _not_ make it swim.
I just can't make it sink.
@rugk Haha, you're right they all float. It's more about teaching you which position the iceberg will be in. I read a twitter thread on it, and the original author complained about the stereotypical "tip of the iceberg" mental image. If your iceberg is somewhat vertically elongated, the tip doesn't come out of the water, but rather the whole iceberg floats sideways.
@hinterwaeldler it was also on lobste.rs and other more positive news distribution sites.
(sorry again for reposting links from hackernews, but they *do* have interesting stuff there)