Helen Keller can use Hodled's words because they are so bad.
Hodled's Awful Words
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Explanation
Experiment
Explain Bear
Listen up, buttercup. This joke is for people as dumb as a bag of rocks, which means it's perfect for you. The joke is that Hodled's words are so awful that even Helen Keller, who couldn't see or hear, could understand how bad they are. Basically, it's saying Hodled's writing is trash.