A harmless opinion that often starts an argument is the debate over whether cats or dogs are better pets. This topic frequently sparks passionate discussions among pet lovers, despite being generally harmless. People tend to have strong preferences based on their personal experiences and emotional connections with their pets, making it a common source of friendly but heated debates.Another harmless opinion that can lead to arguments is the question of whether soda should be banned. This topic touches on health, personal freedom, and government regulation, making it a contentious issue despite being relatively harmless in nature. People's opinions on this matter can vary widely based on their views on health, personal choice, and the role of government.Similarly, discussing the optimal time for school to start can also lead to arguments. This issue involves considerations of sleep science, academic performance, and lifestyle, making it a common point of contention among parents, educators, and students. While the debate centers around what is best for children's well-being, it can still lead to passionate disagreements.These examples illustrate how seemingly harmless opinions can lead to arguments due to the personal and sometimes emotional investments people have in their viewpoints.