> How do I know that what I am thinking is actually being conveyed correctly via the gadget implanted in my brain to the external observers Isn't possible to a

> How do I know that what I am thinking is actually being conveyed correctly via the gadget implanted in my brain to the external observers Isn't possible to ask those external observers to repeat the message I sent to them? If the message is correctly transmitted back to me, then I know it works.