>>3
Actually, there are various ways for thought-reading.
For example, as a way to 'read out' behaviors of laryngeal nerve is one of the comparative easier ways than ways to directly read out signals from a brain, this is widely used.
Namely, in this case, it's utilized for realizing this method that thought contents in a brain are transmitted to a laryngeal nerve as signals.
Then, if 'something' is imagined in a brain, subtle variations are caused around the laryngeal part with saying nothing.
※ For example, there actually exists a device to freely operate a wheelchair with 'only thinking' .