Facts are universally proven, which means they are true and that isn't something anybody can change. Opinions are a person's personal beliefs and views on a subject, and everybody has a different opinion.
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An opinion is something someone forms based on their feelings and experiences. It does not rely on facts. A fact is something that can be validated by others and direct observation.
A fact is something that can be tested and proven to be true. An opinion is something that a person thinks or believes , but which cannot be fully proven. Others may hold a different opinion.