@Steve ******
yes, the one who told him about that rule is wrong... but so are you (or you could be). There is no guarantee that anyone will be allowed to enter on visa exemption a second time, not long after the first stay. Most likely, yes - 100% sure, no! It's clearly become harder lately and there's been several reports about people getting denied. In the end it is up to the immigration officer. Previous travel history, that we know nothing about, matters too.