value judgment
US /ˈvæl.juː ˌdʒʌdʒ.mənt/
UK /ˈvæl.juː ˌdʒʌdʒ.mənt/

1.
a judgment of the rightness or wrongness of something or someone, or of the usefulness of something or someone, based on a comparison or other subjective assessment rather than on objective evidence
:
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It's important to separate facts from value judgments.
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His comments were based on a personal value judgment, not objective data.