Replies
BenMingov November 15, 2019
Hi Arthur-Guerrero, thanks for the question!I see how that can be confusing. However, "but" is not another rule to memorize in general. It is context dependent, and let's look at the example under question.
"Specimens with fuzzy seeds always have long stems but never have white flowers"
In this case, it is not exactly that "but" means "and", however it does serve the purpose to tell us that both long stems and not white flowers applies to specimens with fuzzy seeds. This is why the word "and" was used.
All in all, I would not worry too much about this and just work on a case by case basis.
If you have any other questions, please let us know. Hope this helped!
BenMingov November 15, 2019
Sorry about the name spelling! Autocorrect was incorrect!