I saw a Hong Kong advertisement about Colgate . It talked about how a doctor made a lab with a group of children, and used 3D animation to demonstrate, so it proved the toothpaste can clean very dirty things on your tooth. At the end, they say they did the research in Hong Kong and most dentists as suggest you use Colgate. So, I think it is uses Ethos. They used the data, pictures and 3D animation to try to let people believe their toothpastes can clean your tooth very well, and make people want to buy their products. Be honest, if what they showed in advertisement is true, I think it was reasonable. Because, they use a lot of evidence to support their opinion and looks professional. They did lab work and research. It's very convincing . Actually, after watching this advertisement, I would love to buy Colgate, but I won't do that. Because while I think Colgate maybe a good toothpaste, it is an expensive kind of toothpaste, I don't want it to cost much money to bu