Reliability = usefulness + purpose?
Can cross-referencing help? What do you cross-reference to?
Do you believe what you see? Or do you see what you believe?
Is it possible to be objective?
This is like a Source-based case study...
Where there is an existing issue [Medal Tally];
different sources present different views [US, China & EU];
they are all seem right and true;
reliability and usefulness are determined by PURPOSE [L5/7]!