Sentence: "It is this hat that that he was wearing is certain."
Would a linguist rate this sentence to be acceptable linguistically?
A: unacceptable

Sentence: "The jeweller decorated the ring with the name."
Would a linguist rate this sentence to be acceptable linguistically?
A: acceptable

Sentence: "John asked who and where Bill had seen."
Would a linguist rate this sentence to be acceptable linguistically?
A: unacceptable

Sentence: "Ellen warned against skating on thin ice."
Would a linguist rate this sentence to be acceptable linguistically?
A:
acceptable