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Keyboard and mouse are the opposite of efficient - they are an extremely slow interface. Let's say you saw a person and want to transfer his image from your brain to a computer - how long would that take with a keyboard and mouse. An efficient brain computer interface should be able to do it in a second.

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I just did a search on "blind person using computer" most used keyboards, some also used voice tools built into the OS. Whats the throughput on existing B2C tools?

I see research but not anything I can buy right now.

Actualy, if you receive input data faster than you can process and think, wouldn't that in effect just be a program telling you what to think and do? You could resist, but not be able to independently decide what to do anymore than if a room full of people were shouting at you 24/7.

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