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All three of these reasons shows that he didn't live up to his belief against slavery and that everyone are equals. He called Black people pests, owned 80 slaves, and called a combination between White and Black people a disgrace. There's other way to say that he turned on hi belief.

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in Doc. 2, Jefferson said that their (Black people) combination with White people produces a disgrace. This proves that he betrayed his belief saying that everyone are equals. This shows that his belief was a lie.

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one of his beliefs were that   everyone should be treated equally and yet in Doc. 2 he considers Black people as pests. This goes against his belief because if he would truly believed that, why would he be against black people.

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in Doc. 4 Jefferson owned 80 slaves in Virginia. This Shows that he betrayed his beliefs because he was against slavery and here he is having all these slave and only freeing 7 of them.

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He didn't live up to all of his beliefs.