The post says he's in a furnished home with an unspecified amount of kitchenware. That's what I'm taking for granted. You can easily make a loaf of bread with exactly these items: flour, water, salt, yeast, a bowl, your hands, an oven, a sheet pan. Amounts can be eyeballed, and you knead and add flour or water as needed. Yeah, dish soap is nice to have, but who is imagining that Mr. Sivers is trying to live without dish soap?