The reason I wonder is because the above sentence clearly uses ellipsis. In ellipsis, the word(s) ellided must be 'exactly' the same as the words that have appeared in the first half of the sentence. So, the above sentence would read:
I am older than you are older.
But the above sentence clearly is non-sensical. Perhaps, the following might be accepted:
I am older than you are old.
Top answer
I am older than you are is perfectly correct. The "are" is understood in the first sentence.
— Sam1947
I am older than you are is perfectly correct.
The "are" is understood in the first sentence.
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