After a cliff-diving accident, raul's doctors are unable to see any indication of electrical brain waves. at this point, raul's doctors will likely deem him

"brain dead"

Explanation:

When the electrical signals in the brain are completely inactive the brain is considered to be dead. At this point it does not work at all and the body will continue to work for a very short time unless all the organs are kept functioning by a breathing machine. Therefore Raul's doctors will likely deem him "brain dead". It is believed that once the brain is dead the person is dead as well since there is no known way of reviving the brain.

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obviously, the latter.