I think every animal (including humans) have instincts that they respond to., even if irrational. Otherwise nobody would ever have babies... but social animals, such as elephants are designed to survive by communication and I think many are far more intelligent than we give them credit for.
Look at dogs and cats... even without literally speaking our language, they have managed to make best friends with us, so they are sheltered, fed, loved, cuddled, vaccinated etc etc, instead of living in the wild and fending for themselves. That surely is very intelligent.