A Brain Interface Needs an Undo Button

Communication is more than output

Imagine composing a sentence through a device that estimates what you intend to say. Most words arrive correctly, but one changes the meaning. You need to stop the output, replace that word and continue without losing the thread of the conversation. The quality of this moment matters as much as the speed of the original transcription.

Brain–computer interfaces translate measured neural activity into useful outputs such as text or device commands. For communication, success involves a complete interaction: forming a message, seeing or hearing the result, correcting errors and deciding when to share it. A decoder is essential, but the person using it needs control over the entire loop.