The paper shows some significant evidence that human coin flips are not as fair as I would have expected (plus probably a bunch of people would agree with me). There's always some probability that this happened by chance, but this is pretty low.
Of course, we should be able to build a really accurate coin flipping machine, but I never would have expected such a bias for human flippers.
This is why science is awesome and challenging your ideas is important.
Edit: hopefully this is not too wrong a place, but Lemmy is small, and I didn't know where else I could share such an exciting finding.
I, too, was a poor grad student.
At that time I didn't have a child to suck the life out of me. Just a dissertation.
(My hypothesis is that the child is worse, but my wife won't let me conduct double blind, placebo controlled studies. Fortunately, we didn't have twins...)