"preconception" in the noun sense
1. preconception, prepossession, parti pris, preconceived opinion, preconceived idea, preconceived notion
an opinion formed beforehand without adequate evidence
"he did not even try to confirm his preconceptions"
2. bias, prejudice, preconception
a partiality that prevents objective consideration of an issue or situation
Source: WordNet® (An amazing lexical database of English)
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