Direct opposites:
* Disregarded: Meaning to not consider or pay attention to something.
* Rejected: Meaning to refuse to accept something.
* Dismissed: Meaning to treat something as unimportant or not worth considering.
Other potential opposites:
* Considered: This implies a more deliberate and thoughtful assessment than simply being deemed.
* Disputed: This suggests that the assessment is being challenged or questioned.
* Unacknowledged: This implies that something is not even recognized, let alone deemed.
Example:
* Deemed: "The project was deemed a success."
* Opposite: "The project was dismissed as a failure." or "The project was rejected due to lack of funding."
Ultimately, the best opposite of "deemed" will depend on the specific situation and the intended meaning.