Hemingway’s Iceberg Theory holds that a character’s inner life should be submerged, invisible to the reader but with an undercurrent of feeling in the text. That I get.
His other theory of stripping down language is less appealing. So many simple sentences. Everything is described as good or fine or hot. Characters speak “rot” most times. For me it got a bit tedious. I admire the book, but it’s not a style I’d want to imitate.