Scenario $1$: You receive an email from a Prince in Nigeria asking for monies to help get the princess out of jail. It will be a loan and when the princess is free, she can access her accounts and pay you back plus a large bonus for having helped. The prince ends the email with this statement:

$4,$ prince Nibala, assure that this is me and that this email is legitimate. You can trust this email and any others that come from me$."$

Identify the logical fallacy:

Circular Reasoning.

Scenario $2$: You heard an advertisement that four out of five dentists recommend Wave Mouthwash. Wow, it must be the best mouthwash on the market. $($It turns out only five dentists were asked$).$

Identify the logical fallacy:

Hasty Generalization