The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
If you're going to do higher level math, you need fact fluency. And if you think of cognitive load theory, right, you have a certain number of working memory slots. And the level of complexity of the math problem that you can solve is going to be based on how many slots you have and right how you're using them. And you know one of the few places in in in brain chemistry is if you uh have memorized something to fluency it doesn't use a slot. It doesn't use it.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
But if you have to use your slots to say 7 * 8 is 56, you're now trying to do higher level math and you're using it up on the wrong things.
And if you think of cognitive load theory, right, you have a certain number of working memory slots and the level of complexity of the math problem that you can solve is going to be based on how many slots you have. If you uh have memorized something to fluency, it doesn't use a slot.