A brain-computer interface can already let a paralyzed person type at 22 words per minute using thought alone. It can let someone with ALS speak again through a synthesized voice built from their own neural signals. It can detect a seizure before it starts and stop it. These are not hypotheticals. They happened in 2026. That same technology, in a different application, could tell an employer whether you were paying attention in a meeting. It could reveal that you are lying before you have...