Bad phrasing. I read your previous comment as demanding an explanation from me for why the author wrote an article about simple design rather than about user testing.

Honestly, I don’t think the article would have been well-served by detouring into user testing. It’s long enough as it is, and again – NN group has written a LOT on the topic.

I’m not really sure why you brought it up in the first place. It seems like ‘beating a dead horse’ territory.