A person who questions or doubts accepted opinions.

A person known for their critical thinking and questioning nature.

आलोचक

English Usage: As a sceptic, she often challenged popular beliefs during discussions.

Hindi Usage: एक आलोचक के रूप में, उसने अक्सर चर्चाओं के दौरान लोकप्रिय मान्यताओं को चुनौती दी।