What are some mechanisms for the latter? Two come to mind:
1) number of independent confirmations by others
2) parse and compare to a knowledge graph
What else?
2) Parse and compare to a knowledge graph: look up each assertion in a database of facts
thenextweb.com/podium/2019/06…
Would be interesting to partition a knowledge graph into the constant stuff (eg value of pi) and the variable stuff which differs between different groups.