Oh, this is a fun Gettier, with some language ambiguities, and some ship of Theseus sprinkled in! Let's say some smart-aleck travels back in time to when the En

Oh, this is a fun Gettier, with some language ambiguities, and some ship of Theseus sprinkled in! Let's say some smart-aleck travels back in time to when the English language was being developed and replaces all cows with robot cows such that current cows remain biological. So technically the word "cow" refers only to robot cows. What then?