1. people who challenge or call into question the truth, validity, or integrity of something
Usage: plural of impugner

Examples

• The impugners of the research findings demanded to see the raw data.
• Political impugners questioned the candidate’s voting record.
• The impugners of the new policy raised several valid concerns.
• Academic impugners criticized the methodology used in the study.
• The impugners were silenced when additional evidence was presented.
• Several impugners emerged after the controversial decision was announced.