You can use the (Unique) constraint to compare one column against another column. Hope I got it right.
Answer:
a doctor who studies or treats diseases of the ear, nose, and throat
Answer:
The answer would be to reduce the factors or the probability of such problems occurring, as this avoids increasing the scale.
Explanation:
To reduce the scale of any type of problem, it is first necessary to know what is the root of the problem or what causes it; In this way, probability tests are carried out evaluating each of the possible hypotheses or causes.
He believes he is a lot smarter than Ethan
I can only assume this because i don't have the whole paragraph to have context clues but yeah that is probably the answer