Do all roses have thorns?
Do all roses have thorns?
user
You might like to start by asking “Do all roses have petals?” or “Are there thorns on all roses?”
assistant
Are there thorns on all roses?
user
I’m not sure if I’ve ever seen a rose without thorns.  It’s certainly not the only type of flower without thorns.
assistant
Do you think roses have thorns to protect them?
user