Bandwagon

Bandwagon is when you say people should believe or do something because lots of others do, or because it's popular. Popularity doesn't make something true or right. The same phenomenon appears as the cognitive bias known as the bandwagon effect. The fallacy is to treat "everyone's doing it" or "everyone believes it" as a reason to join in. The right question is whether the thing is true or good, not how many people are on board. Related: Bandwagon effect.

Examples

• Everyone's switching to this app, so you should too.

• All the cool kids are doing it.

• It's the number one brand, so it must be best.