[Novukus]

I'm not sure you read the article with good faith.

After the penny example, he goes on to talk about how important retrieval and exertion is to solidifying memories.

> Quizzing/testing/assessing one’s knowledge via answering recognition or recall questions, for example, is more difficult than simply rereading notes.

He then quotes:

> “Effortful retrieval makes for stronger learning and retention. We’re easily seduced into believing that learning is better when it’s easier, but the research shows the opposite: when the mind has to work, learning sticks better.” (5)

Going by what he says, I would suggest that his preferred learning strategy would be to, if you know you're going to be quizzed on what a penny looks like, try to recall what it looks like from memory. Then compare it to the actual penny, note what you got wrong, then try to recall it again. That's the kind of repetition and retrieval practice he's recommending in the article.