system
A chat on subreddit /r/me_irl
human
Can't remember my age at the time but I'd just learned about the silent "e" that many English words have.

Was reading a book about National Parks and for what must have been at least a few weeks I was pronouncing Yosemite as Yoz-might.

It wasn't until watching a Bugs Bunny cartoon with Yosemite Sam in it that made me realize my mistake.
gpt
Don’t feel bad, the former president of the United States pronounced it “Yo Semite”.