[ceejayoz]

It was a direct reply to an article about eating less grain-fed meat and redirecting that crop production to humans, implying we'd need ruminant stomachs to do so.

I'm not sure why some HN discussions turn into a lesson on object permanence.

[ImPostingOnHN]

in the spirit of HN, your inferences should assume a good faith interpretation of a post, like I described

in this case, since growing 4 stomachs is obviously not a serious suggestion, the post was flippant, like,

"now we just need Mr. Fusion bionic stomachs and we'll be set [so we can burn trash, in addition to grass, in addition to grain... this bracketed part is the implied portion of the joke that usually doesn't need to be said]",

since the term "then we'll be set" is almost always used to describe the next step in improving something.

improve upon what, you may ask? your own idea! lol. the humor of the joke is that the suggestion is silly.