It specifically mentions the potato phenomenon:

> It’s worth noting here that the star performer in the satiety study was the plain boiled potato. People found it filling and hard to eat much at the buffet three hours later. This could be due to the low palatability of plain potatoes or the effects of resistant starch which forms when we cook and cool potatoes before eating.

> You may have heard of the Potato Hack Diet where people eat nothing but potatoes and lose weight. Unfortunately, while satiating, plain potato is not the most nutrient-dense and may not provide enough protein to maintain high levels of lean muscle mass during weight loss. You would also need to eat it without added fat (e.g. butter, oil, etc.). Otherwise, it’s extremely easy to overeat (e.g. chips).

That's why I speculated that a diet of potatoes, a lean protein source or two, and no added fats could make for a diet that's nutritious and promotes weight loss.

I'll probably break all of these rules and have fish and chips tonight!