A meta-analysis of 3,075 college students just settled the laptop vs paper debate. Handwriting won. The effect size: r = -0.142 favoring pen. Translated to actual outcomes, switching from pen to laptop pushes 25% of students from above the mean to below it. In education research, that's a massive intervention. The mechanism is the boring part everyone misses. Lecture speech runs around 125 words per minute. Handwriting tops out around 22 wpm. Touch-typing hits 40-60 wpm. Do the math. The…