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Even DNA analysis can be flawed.

While it is not perfect, the other examples have been shown to basically be fraudulent. Different levels of flawed.

DNA has been used to help free people, but even when the evidence is available it's often suppressed to get a conviction.

https://en.wikipedia.org/wiki/Innocence_Project

It still isn't perfect, and the certainty of a match has been over sold to get convictions too. It's rare, and requires intentionally misleading people, while my other examples could be wrong with everybody trying to be honest.

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