She is not “dumb”. She is doing the job for which she was hired: to defend the Biden administration, no matter what, and to give non-answers to press questions.
Dems do not care about lying, and she is a master of lying with a straight face. One of the tenants of the communist party is …. Lying for the good of the party is a good……
She can be dumb and an inveterate liar at the same time.