These are the most frequently used words in this book.
ancestors
animals
another
arguments
bad
basic
behaviour
better
between
body
brain
capacity
cognitive
colour
come
computers
conscious
culture
different
does
drugs
effects
emotional
emotions
even
event
evolved
example
experience
experiment
expressions
facial
fact
fear
feel
feelings
few
first
good
group
happiness
help
higher
however
human
idea
innate
joy
kind
less
life
long
love
machines
may
means
memory
might
mind
mood
moral
must
natural
now
ones
others
own
part
particular
people
perhaps
person
rather
really
reason
robot
see
seems
should
someone
state
still
system
take
technologies
theory
things
think
though
thought
time
today
two
use
view
without
words
work
world
years