I don't think that passes the smell test. What study would you cite to support that assertion? You could ask whether there is a study to assert parent poster's

I don't think that passes the smell test. What study would you cite to support that assertion? You could ask whether there is a study to assert parent poster's assertion, too. All I could say is that the burden of proof seems to fall on you with your statement, but most would take parent's at face value.