Fabian Theis says students who have completed a master's degree may know some science but may not yet know exactly what interests them.

“So not just a bachelor's in US, right? So you do like one or two year more of master. And, and then they sort of know science a little bit, but they don't exactly know what sort of interests them. So in this combination type of thing, you know, they can sort of sample a bit because in this grad school they get different proposals, and so they can sample a bit what they're interested in, in terms of domain, but then they can also play around a bit with the method side.”