Ignoramus
An extremely ignorant person who is too stupid to exist.
As in Gretchen Carlson is an ignoramus because she didn't know what ignoramus meant, so she looked it up online and said it is an ignorant lawyer.

or

Gretchen Carlson is too fucking stupid to know a simple word a 10 year old could figure out, and also too fucking stupid to look up the proper fucking definition... again... something a 10 year old could do. Gretchen Carlson is therefore an ignoramus and too fucking stupid to exist.