Yeah, that's very true. For the first two or three months, you'll often get freshers asking about how much depth you go into with a PBL, with some people writing an essay on encephalitis because the word "Head" was in the scenario and others not getting barndoor clues like "A 58-yo smoker presenting with cough and haemoptysis" are code for carcinoma of the lung (It could be other things, but for exam purposes it never ever is). You just develop a bit of a sixth sense for it really, learn to get all those common things. Or you turn into the kind of person who talks about chromosome number abnormalities on emergency admission ward rounds.