Still, stabbing friends with pointy metal objects resembles language learning more than you might think. Your goal in fencing is to stab people automatically. You spend time learning the names of the weapons and the rules of the game, and you drill the proper posture, every parry, riposte, and lunge. Finally, you play the game, hoping to reach that magical moment when you forget about the rules: Your arm moves of its own accord, you deftly parry your friend’s sword, and you stab him squarely in the chest. Point