Thus, faced with an allegation of sexual abuse can’t rule out the possibility of being false. Therefore, knowledge of the dynamics of sexual abuse and the dynamics of parental alienation by the professional responsible for the psychosocial study is essential for a correct assessment of the case, as both indicators can confuse you, since they are quite similar - although the cause of each is different. Often, parental alienation can progress to the implementation of the parental alienation syndrome - PAS, the child may exhibit emotional symptoms typical of those who suffered sexual abuse as described by Gardner (2002a). And without the necessary interaction of both contexts and the presence of symptoms occurring, takes the serious risk to accept the sexual abuse, when in reality, it is a framework of PAS, arising therefore to a traumatic situation. I think in face this difficulty would be naive to believe that the absence of material evidence of sexual abuse, the child does not necessarily present any kind of sequel because of the accusation is false, since it occurs in the "false" memories, the psychic reality of the child indicates existence of abuse. Within the judiciary, the knowledge of the subject is necessary not only to the professional responsible for the psychosocial study, but also for legal operators, which will analyze each case from the legal perspective. Regarding to the law professional, as a rule, the origin of psychic reasons demand are relegated to the background, because is not prepared to recognize the meanings of the messages. Therefore, the context in question defines a fertile ground for the study of dialogues between psychoanalysis and the law. The dialogue between booths, although each has its peculiarities, is important in light of the process of reflection on the human constitution. Trindade (2012) emphasizes that the individualized and disciplinary knowledge are no longer harboring these days, marked by complexity and globalization. Undoubtedly, in the law field, one of the difficulties for that interface appears when many of its concepts, seen
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