I'm pretty sure that's false. For example, research shows octopuses to be very smart, and recent research shows that elephants have vocalized names for others in their herds. Moreover, on another level, as many rightly point out that the mind is different from the brain and is part of electromagnetic biofields as are souls, and as many species besides humans have souls, which is something I always believed through intuition but now know as my spirit guides answered Greg's question about Marcus's 3 non human incarnations among the 17,046 with dog, lamb, and horse ...