Onset often occurred suddenly over 1 to 3 days (49.6%) and involved the use of word combinations (97.1%).Isn't a sudden onset impossible if I and many other claim neuronal damage due to genetics or a neurological incident? Not really. Think of a car that has a defective motor that overheats if you hit 140 km/h and drive in warm weather. If you buy your car in Spring and drive slowly for the first few weeks as the manufacturers suggest, you will not notice the damage. The sudden onset could show the switch of the brain from simpler speech to full-blown complex speech. Their observation that word combinations are involved might be an important clue. So what about those who do not have a sudden onset? Maybe their problems are less severe. I do not know.
As I said a few times: We need more research on the period before onset. And I am glad they did this study. We commit a fallacy by studying the period after onset assuming that that's the moment the issue started! It starts much earlier!
Don't tell me that you have to do research on kids just after onset, because before onset is so much more difficult. My answer is: Well, then don't do any research! Do something else, something productive: spend more time with your family, do more therapy, join forces with other researchers, and so on!