regarded as out of疑问

In the United States，a person would be regarded as out of his mind if he dared to challenge the authority of the dictionary.

如何理解这里的as out of结构？

be regarded as + adj/noun 是非常容易见到的使用方法。out of mind 等于形容词=crazy.

请看外媒例句：1. Literacy and illiteracy may be regarded as mutually complementary.

                          2. Still horses can be regarded as fairly intelligent.

                          3. This may be regarded as unfair competition.