Talk politics.

Data is just data, but the conclusions people draw from the data are often misleading or flat out wrong. People will have some data that says that cats exhale carbon dioxide then conclude that CO2 in the atmosphere is all from cats. Or people will note that CO2 has existed before cats and conclude that no CO2 in the atmosphere is from cats. Both are 'something to say' that they will tell you 'is backed up with data', but both are assuming a whole lot from the data they claim supports them.