Question

why do dr. mesgarani and his team believe its possible to translate peoples thoughts into electronic speech? some illnesses and medical conditions can harm peoples ability to speak. human speech is controlled by specific electrical currents in the brain. peoples brain waves are similar for imagined and for spoken thoughts. people often have trouble speaking the words they want to say.

Explanation:

According to the principle of thought - speech translation, if the brain waves for imagined and spoken thoughts are similar, it provides a basis for translation. Option 1 only states a problem of speech ability harm, not a reason for translation. Option 2 mentions electrical currents controlling speech, but without the similarity of brain waves for imagined and spoken thoughts, translation is not directly supported. Option 4 is about speaking troubles, not related to the possibility of thought - speech translation.

Answer:

People's brain waves are similar for imagined and for spoken thoughts.