Is the following sentence linguistically acceptable?
The jeweller decorated the ring with the name.

acceptable

Is the following sentence linguistically acceptable?
Willy is taller than I know a boy who is.

unacceptable

Is the following sentence linguistically acceptable?
That dog is so ferocious, it even tried to bite himself.

unacceptable

Is the following sentence linguistically acceptable?
Who are you gawking at?
acceptable