Question

how was invent world idiot

Answer 1

Idiot was formerly a legal and psychiatric category of profound intellectual disability, where a person's mental age is two years or less, and he or she cannot guard himself or herself against common physical dangers. Along with terms like moron, imbecile, and cretin, the term is now archaic and offensive,[1] and was replaced by the term profound mental retardation (which has itself since been replaced by other terms).

Nowadays, "idiot" is a derogatory term for a stupid or foolish person.
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Answer 2

Idiot was formerly a legal and psychiatric category of profound intellectual disability, where a person's mental age is two years or less, and he or she cannot guard himself or herself against common physical dangers. Along with terms like moron, imbecile, and cretin, the term is now archaic and offensive,and was replaced by the term profound mental retardation (which has itself since been replaced by other terms).

Nowadays, "idiot" is a derogatory term for a stupid or foolish person.