Scholarly method or scholarship — is the body of principles and practices used by scholars to make their claims about the world as valid and trustworthy as possible, and to make them known to the scholarly public. Wikipedia
That is not to say that these ideas should apply to the scholars lives or how their work is used. Philosophers, intellectuals, religious leaders, writers, journalists, artists and scholars apart from the few have never been known for upholding truth against power, probably mostly the opposite.
It is no different today.
If intellectuals upheld the truths they know of and voiced them in public they would probably end up in jail or lose their privileged position in education, government, or who ever is maintaining their “expert” status. We know this by the actions of the few who do, the whistle blowers and others who have sacrificed their privileges for the cause of truth.