The word for today is…
erroneous (adjective) -
1: containing or characterized by error : mistaken
2 archaic : wandering
Source : Merriam-Webster
Etymology : Erroneous basically means "containing errors", and, since most of us are constantly suffering from mistaken notions, the word is often used in front of words such as "assumption" and "idea". It's also used to describe the kind of mistaken information that can lead to erroneous theories, erroneous conclusions, and erroneous decisions.
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