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In page Patterson–Gimlin film:

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Polygraph tests regarding their claims have been passed by both Heironimus[25] and Patterson.[26] It should also be noted that Heironimus had previously failed the test three times, only passing on his fourth attempt.[citation needed] Additionally, Edward Gelb, the man who administered Heironimus's successful polygraph attempt, was later revealed to have faked his credentials, including his diploma and PhD,[27] causing him to be widely considered to be a fraud.