Corroborate threads from multiple, non-including non-approaching sources from different globe- regions, ideally from different time periods. Seek peer reviewed, transparently funded sources.

If there's an opinion to be formed, seek it out yourself.

If someone anonymous tells you something, they had a reason to do so. Hold them in high suspicion, they spent their time on you. No one works for free.

Trust experts, but diversify sourcing as above.

Ultimately, everything I just said is a lie.