I remember in like 5th grade rural PA schools learning about Boolean operators in search engines and falling in love with them. For context, they were presenting alta vista and yahoo kids search as the most popular with Google being a "simple but effective new search platform" we might want to check out.

By the time I graduated highschool you already couldn't trust that Boolean operators would be treated literally. By the time I graduated college, they basically didn't seem to do anything, at best a weak suggestion.

Nowadays quotes don't even seem to be consistently honored.