What this means is that they would deliberately make you feel crazy, or cause you to doubt your sanity, in order to gain the upper hand. This led to the development of constant self-doubt during your childhood, adolescence and present life. Read more about gaslighting. In other words, one child was seen as perfect and capable of doing no harm. The other child was seen as the black sheep and the cause of all issues this is also known as an identified patient. These roles could have also switched frequently. Did you ever criticize your mother or father.