... and the lack thereof. I have remarked here that it seems to me that there are more and more scientists who, however fine their expertise in their specialty, seem to lack a capacity for clear thinking. This, I think, is made manifest here: Biological Basis For Creativity Linked To Mental Illness. (Hat tip, Dave Lull.)
It would appear that they have established that mental illness and creativity both correlate to low levels of latent inhibition. They have not, however, established that mental illness and creativity correlate to each other. They assume that. Notice also this quote: "The normal person classifies an object, and then forgets about it, even though that object is much more complex and interesting than he or she thinks. The creative person, by contrast, is always open to new possibilities." Again, creativity is assumed to be abnormal, and normal people are assumed to lack creativity.