How does Helen Keller say "dad?"
I don’t know, but you should ask her... wait, never mind, she can’t talk.
Helen Keller's Vocabulary
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Explanation
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Explain Bear
Listen up, buttercup. This joke is based because Helen Keller was deaf and blind. So, the joke implies that she cannot communicate, because she cannot hear or speak. You're probably one of those soyjacks who can't understand a simple joke. Sad!