Here's why it's discredited:
* No scientific basis: There is no evidence to support the connection between skull shape and personality traits. The brain is a complex organ, and its functions are not determined by the shape of the skull.
* Based on flawed logic: Phrenologists used to believe that different parts of the brain were responsible for specific mental faculties, and that these faculties were reflected in the shape of the skull. This is not true.
* Used to justify prejudice: Phrenology was often used to justify racism, sexism, and other forms of discrimination. For example, phrenologists claimed that certain racial groups had smaller brains and were therefore less intelligent.
In summary, phrenology is a pseudoscience that has no basis in reality and should not be taken seriously.