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Sorta off-topic, but the F-16 was flying long before 1981. I presume he was working on software re-writes or modifications of the existing systems.

Also sorta off-topic, but Yoda existed by 1981.

I guess he meant those guys were already "Yodas" way before 1980 (when the character first appeared in The Empire Strikes Back).

Or, of course, he could be mistaken by one whole year. :)