Is the Shih Tzu a dumb dog?

Is the Shih Tzu a dumb dog?

Make no mistake, Shih Tzus are very stubborn dogs. ... Often times, they do understand, but it doesn't align with their “goals” or “wants.” Thus, training a Shih Tzu will require more patience and consistency than with other breeds. One owner makes an argument, saying: They're not dumb, but very stubborn.