Comment by grolimpio

I don't think that fact is an 'idea'; if something can't be proven to be true, it isn't a fact. We should consider calling it something else.

The concept that needs revising is our understanding of social media posts as being automatically considered 'facts'.

If it can't be proven, if we can't trust any vehicle to independently verify its veracity, then we simply have to check as many sources as we can and consider it as a possibility, not a fact.