The “-oid" ending in English is normally added to a word to indicate that an item is not the real thing. A humanoid is not quite human. Originally “factoid" was an ironic term indicating that the “fact" being offered was not actually factual. However, CNN and other sources have taken to treating the “-oid" as if it were a mere diminutive, and using the term to mean “trivial but true fact." As a result, the definition of “factoid" is hopelessly confused and it’s probably better to avoid using the term altogether.
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