Long ago, in 2006, neuroscientist Adrian Owen already proved that it IS possible to read the human mind, if it happens to be inside an MRI machine at the time that is! When thinking the answers to simple questions, our brains change enough for Magnetic Resonance Imaging technology to tell the difference between yes and no responses. The most impressive bit is that this works even with coma and vegetative patients! That also confirms that they are aware of what happens around them.

More information:

nature.com/neuroscience-the-mind-reader