I understand evidence is important. I guess the issue I have is how much certainty do we assign to whatever origin we attribute. I guess we can say that the e

I understand evidence is important. I guess the issue I have is how much certainty do we assign to whatever origin we attribute. I guess we can say that the explanation in the article is the best guess with the available evidence but what do we do if the evidence is limited? Take the example I gave. How many cardboard boxes were around when people decided to start hunting down the first instance of “OK”? What is the likely hood of someone photographing one of those boxes given the prevalence of photography at the time and the importance of a cardboard box?