[wahern]

Depends on what is meant by bullshit. Yes, if it meant that the study was absolutely wrong. No, if it meant that the study failed to provide any evidence whatsoever that there exists a correlation.

In science guess who has the burden?

In a legal context the burden of proof is broken down into the burden of production and the burden of persuasion. If you fail to meet the burden of production it's fair to say a claim is bullsh*t. It necessarily follows that if you haven't met the burden of production you cannot have met the burden of persuasion as a logical matter.

Remember, any claim must stand on its own terms. It doesn't matter what is the reality or truth of the matter. We can never know the absolute truth of something. We can only attain a slightly firmer grip on reality when people propose persuasive arguments. Maybe you can mine a failed argument for useful bits, but a good rule of thumb is that it's not worth the time if the argument cannot even meet a minimal burden. If it wasn't worth the claimant's time why would it be worth yours? That's strong circumstantial evidence to move on.