A more thorough explanation:

Emotional incapacity refers to the inability to control one's emotions or express appropriate emotions due to a mental disorder. It can also refer to bias, corruption, or interest that affects a witness's ability to testify.

Someone with borderline personality disorder may have emotional incapacity, as they may struggle to regulate their emotions and have intense and unstable relationships.

In a court case, a witness who has a personal interest in the outcome of the trial may have emotional incapacity, as their bias could affect their ability to provide an objective testimony.

These examples illustrate how emotional incapacity can affect a person's ability to regulate their emotions or provide unbiased testimony. It is important to recognize and address emotional incapacity in order to ensure fair and just outcomes.