I see an issue with the idea - The player can just rollback to previous dialogue in Ren'py, can't they?
A player can hit back if they wish too, though that is their choice. My plan at this point is to have a choosing the wrong option lead to falling off the mountain and respawning at the wizard's workshop and having to start again at the flower field.
Ahh, I see. Having the choice to rollback or just not doing it actually sounds nice..!