Delusions are false beliefs contrary to reality, with Mary experiencing grandiose delusions of importance as the President and Queen of the Universe.
Delusions are false beliefs that are maintained despite being contradicted by reality. In this case, Mary is experiencing grandiose delusions, where she believes she holds special power or importance, such as being the President of the United States and the future Queen of the Universe. These delusions are common in conditions like schizophrenia.
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