Did a medieval flying monk spot Halley’s comet, twice? It’s complicated

University of Leicester historian thinks Eilmer of Malmesbury saw two different comets: in 1018 and 1066

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[nosh]

A later date for Eilmer’s birth also makes it just possible that the monk lived long enough (to age 90) to meet William in person and “directly passed on the story of his pioneering feats of aviation.”

Wouldn't that make the story less likely to be true?