Yes, we don't truly know much (not nothing). We can, on occasion, drill into whatever is being claimed, look at the data and see if we agree with the conclusio

Yes, we don't truly know much (not nothing). We can, on occasion, drill into whatever is being claimed, look at the data and see if we agree with the conclusion. If you personally sample test studies, comments or whatever you then get a handle on how many assumptions you feel are being made, whether you always/occasionally/never agree with what is stated.