Which informal fallacy is committed in the following statement - "Famous singer Mr. Shantanu says ABC toothpaste boosts our immunity, therefore we must buy ABC toothpaste"?

The informal fallacy committed in the given statement is an appeal to authority.

Key Points

• Appeal to Inappropriate authority is an informal fallacy where an irrelevant or unqualified authority is cited to support a claim.
• The argument relies on the assumption that just because a famous person (Mr. Shantanu) recommends a particular toothpaste, it must be effective for boosting immunity.
• This is a fallacious argument because being famous does not necessarily make a person an expert in toothpaste or immune-boosting, and the argument fails to provide any scientific evidence or reasoning to support the claim.

Additional Information

• Appeal to Ignorance: Using lack of evidence as evidence for a claim.
• Red Herring: Introducing an irrelevant topic to divert attention from the original issue.
• Strawman: Misrepresenting someone's argument to make it easier to attack.