The coffee shop employee didn’t know whether an item contained nuts. A completely reasonable thing to not know off the top of your head, but what bothered me was that she didn’t try to find out. She made no effort to ask a coworker or check the ingredients in the back.
It’s okay if you don’t know. But it’s bothersome to have no effort to find out. This isn’t a rant about coffee shops. This is about everything. Suppose an investor asks a question and you don’t know the answer. You could say “I don’t know.” Or you could say “I don’t know, but I will find out and get back to you.”
Why not take the posture of curiosity rather than complacency? It feels better for everyone involved.